Precious and semi-precious stones, including nonindustrial diamonds, unworked or simply sawn or roughly shaped

Lifecycle status: Candidate
Content maturity: Authored methodology
Current version: No published versionLast updated2026-10-01
Readiness: Review required

Methodology and translation states come from the source record; publishing this website does not change their review status.

Content languages

zh-CN · Aligned

Status, classification and source details

Readiness

Warnings methodology_not_reviewed Authored methodology is candidate guidance and still requires methodology review.

Classification mapping

CPC 3.0:16310 · exact

Source

library/pcrs/ores-and-minerals-electricity-gas-and-water/other-minerals/precious-stones-including-diamonds-but-not-industrial-diamonds-and-semi-precious-stones-71bf0d87sha256:36b5b2d927e9…

1. Scope and Applicability

Supply of natural precious and semi-precious stones, including nonindustrial diamonds, in an unworked, simply sawn/cleaved/bruted or roughly shaped state at one declared recovery, rough-preparation/loading or expressly included plant-receipt gate. Cover nonindustrial diamond and actual natural coloured-stone grades such as ruby/sapphire, emerald/aquamarine, quartz varieties, garnet, tourmaline, peridot, feldspar and opal; each dataset fixes an identified mineral/variety and accepted rough grade rather than averaging every stone. Actual routes include primary rock or pegmatite extraction, eluvial/residual/placer recovery, manual or mechanized washing/screening/sorting, conditionally appropriate host-rock liberation and concentration, and standalone preparation of supplied qualified natural stones. Primary-diamond dense-medium/Xray/grease recovery is one conditional route, not a recipe for fragile coloured crystals or every placer. Record actual deposit, grade-preserving recovery, supplies, water controls and attributable development/rehabilitation. Rough gate includes only actually performed simple sawing/cleaving/rough shaping; unworked product excludes absent operations. Faceting, polishing, drilling bead holes, final cabochon manufacture, mounting/stringing and finished jewellery are outside. Synthetic or reconstructed unworked gems are separately named CPC34560 and HS7104, not assumed natural because their chemistry resembles a stone; cultivated pearls and natural pearls have separate identities. Heat/dye/impregnation or other treatment exceeding the declared unworked/simple rough state requires a separate boundary/category review, not forced gemstone recovery. Industrial-diamond or abrasive grades are separately classified and may be joint outputs, not this reference product. Unsorted mixed diamond recovery must be graded and partitioned before claiming one accepted nonindustrial output. cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.ores-and-minerals-electricity-gas-and-water.other-minerals.precious-stones-including-diamonds-but-not-industrial-diamonds-and-semi-precious-stones-71bf0d87
classification_refs	CPC 3.0:16310
covered_products	Natural precious and semi-precious stones including nonindustrial diamonds, unworked or only simply sawn/cleaved/bruted/roughly shaped; individually specified mineral varieties and rough grades
excluded_products	Industrial diamonds as reference output; synthetic or reconstructed unworked stones; natural/cultured pearls; otherwise worked polished/faceted gems, beads, jewellery or mounted/strung articles; gem dust/powder as reference product; treated/formulated composite stones outside confirmed rough category; downstream use and transport-only services
representative_product	Natural rough precious or semi-precious stone at compatible plant gate
production_route	Gem-deposit development and rehabilitation; Natural gemstone extraction; Gemstone washing and recovery; Simple gemstone sawing and rough shaping; Mine water dust and residue controls; Rough-stone grading and dispatch
market_state	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate

3. Reference Flow

Field	Value
What	Supply 1 kg accepted net rough natural gemstone in one identified variety and grade at selected gate; retain measured metric carats and piece counts as supplementary characteristics, not interchangeable product quality
How much	1 kg
How well	site/year and origin/custody; natural mineral/variety and nonindustrial status; actual primary/placer/supplied-stone route; grade, size distribution, piece count and net mass; unworked or actual simple saw/cleave/rough state; actual enhancement declaration and category check; product gate/transport included; measured gangue/water/grease exclusion; reject/breakage and stocks; supplier burden and economic/physical allocation; each consumable formulation; basin/discharge/waste fate; lifetime development/closure. Category Product/Mass UUID is only compatible natural rough plant state, not geology, pearls, synthetic or finished stones. Electricity identity is only CN1–35kV grid-average consumer supply when matched; other geographies/voltages/providers require distinct identities
How long or cycle	One gate supply within a declared production period
reference_flow_link	`final_product`

Field	Value
Reference amount	1
Reference product flow	Precious stones (including diamonds, but not industrial diamonds) and semi-precious stones, unworked or simply sawn or roughly shaped `33921725-a196-40db-9ddf-a6d3a2b9e3bc`
Reference flow property	Mass `93a60a56-a3c8-11da-a746-0800200b9a66`
Reference unit group	Units of mass `93a60a57-a4c8-11da-a746-0800200c9a66`
Reference unit	kg
Required qualifiers	site/year and origin/custody; natural mineral/variety and nonindustrial status; actual primary/placer/supplied-stone route; grade, size distribution, piece count and net mass; unworked or actual simple saw/cleave/rough state; actual enhancement declaration and category check; product gate/transport included; measured gangue/water/grease exclusion; reject/breakage and stocks; supplier burden and economic/physical allocation; each consumable formulation; basin/discharge/waste fate; lifetime development/closure. Category Product/Mass UUID is only compatible natural rough plant state, not geology, pearls, synthetic or finished stones. Electricity identity is only CN1–35kV grid-average consumer supply when matched; other geographies/voltages/providers require distinct identities

Declare all qualifiers in dataset metadata or reference-flow comments. The representative identity is usable only for its confirmed product state, geography and property; resolve a distinct flow for incompatible variants. It does not impose a default product composition.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_basis	final_product	Mass	kg	D is the positive accepted net gate-output total in kg. Exclude packaging and cancelled internal transfers. cp_output records D; every card uses per 1 kg reference flow.
conversion	utility and material rows	Declared row property	kg; m3; MJ	Retain raw readings. Electricity: 1 kWh = 3.6 MJ. Mass/volume conversion requires measured density, temperature and applicable pressure; retain water content and active chemical fraction.
category_balance	production	Mass	kg	D is positive independently calibrated accepted net gemstone mass kg for exactly the selected mineral/variety and grade at gate, excluding gangue, free water, adhering grease, packaging, rejects and returns. Do not infer D from ore grade, ore input or theoretical recovery. Sum independently weighed accepted parcels with stock reconciliation. Metric1 ct=0.2g=0.0002kg,1g=0.001kg: D=sum accepted carats*0.0002 when the same parcels are weighed in metric carats; verify balance resolution/calibration and round only after aggregation. Count cannot convert to kg without measured parcel weights or actual grade/size-specific mean mass and its uncertainty; no generic gem size/weight. Reconcile feed, retained rough stones, co-grades, industrial stones, fragments/dust, host-rock rejects/tailings, internal rescreening and stocks, without equating host-rock dry mass to pure gems. Keep ore/water mass balances separate from the sparse gemstone mass balance and reconcile uncertainty/detection limits. Record actual sawing loss/breakage per variety and shape; no universal recovery or finished-gem yield.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Actual identified gemstone-bearing primary/eluvial/placer geological deposit for integrated recovery, or externally supplied identified natural rough stones with supplier upstream burdens for standalone simple preparation; cancel internal recovery transfers
starting_condition_role	Resource or supplied feed; declare which
product_classification_scope	Natural precious and semi-precious stones including nonindustrial diamonds, unworked or only simply sawn/cleaved/bruted/roughly shaped; individually specified mineral varieties and rough grades
recursive_input_rule	Purchased same-category material carries a distinct supplier dataset; internal recycling is a balance observation, not a new external input or credit.
upstream_dataset_requirement	Link feed, electricity, fuels, chemicals, infrastructure and waste-management burdens; disclose any missing coverage.
disclosure	site/year and origin/custody; natural mineral/variety and nonindustrial status; actual primary/placer/supplied-stone route; grade, size distribution, piece count and net mass; unworked or actual simple saw/cleave/rough state; actual enhancement declaration and category check; product gate/transport included; measured gangue/water/grease exclusion; reject/breakage and stocks; supplier burden and economic/physical allocation; each consumable formulation; basin/discharge/waste fate; lifetime development/closure. Category Product/Mass UUID is only compatible natural rough plant state, not geology, pearls, synthetic or finished stones. Electricity identity is only CN1–35kV grid-average consumer supply when matched; other geographies/voltages/providers require distinct identities

rule_id	Applies to	Rule	source_ids
boundary_operations	site	Supply of natural precious and semi-precious stones, including nonindustrial diamonds, in an unworked, simply sawn/cleaved/bruted or roughly shaped state at one declared recovery, rough-preparation/loading or expressly included plant-receipt gate. Cover nonindustrial diamond and actual natural coloured-stone grades such as ruby/sapphire, emerald/aquamarine, quartz varieties, garnet, tourmaline, peridot, feldspar and opal; each dataset fixes an identified mineral/variety and accepted rough grade rather than averaging every stone. Actual routes include primary rock or pegmatite extraction, eluvial/residual/placer recovery, manual or mechanized washing/screening/sorting, conditionally appropriate host-rock liberation and concentration, and standalone preparation of supplied qualified natural stones. Primary-diamond dense-medium/Xray/grease recovery is one conditional route, not a recipe for fragile coloured crystals or every placer. Record actual deposit, grade-preserving recovery, supplies, water controls and attributable development/rehabilitation. Rough gate includes only actually performed simple sawing/cleaving/rough shaping; unworked product excludes absent operations. Faceting, polishing, drilling bead holes, final cabochon manufacture, mounting/stringing and finished jewellery are outside. Synthetic or reconstructed unworked gems are separately named CPC34560 and HS7104, not assumed natural because their chemistry resembles a stone; cultivated pearls and natural pearls have separate identities. Heat/dye/impregnation or other treatment exceeding the declared unworked/simple rough state requires a separate boundary/category review, not forced gemstone recovery. Industrial-diamond or abrasive grades are separately classified and may be joint outputs, not this reference product. Unsorted mixed diamond recovery must be graded and partitioned before claiming one accepted nonindustrial output.	`cpc-gems-2025`, `wco-gems-2022`, `ngja-gem-mining`, `gia-diavik-2016`, `nist-carat`
boundary_partition	all exchanges	Include actual conditioning, storage, handling and pollution controls through the declared gate. Account for attributable construction and closure with a disclosed lifetime-output basis or justified exclusion and sensitivity. Separate purchased fuel supply from foreground combustion and purchased treatment from site releases.
boundary_completeness	inventory	Cards define individual likely exchanges and route conditions, not an exhaustive site audit. Add each actual absent chemical, waste, resource, land transformation and pollutant as its own row. Absence, measured zero and unknown must be distinguished.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
development	Gem-deposit development and rehabilitation	conditional	Actual attributable mine/pit/dredge works and closure	Foreground production	per 1 kg reference flow
extraction	Natural gemstone extraction	conditional	Actual primary/eluvial/placer extraction; select only relevant deposit	Foreground production	per 1 kg reference flow
recovery	Gemstone washing and recovery	conditional	Actual grade-preserving recovery; DMS/Xray/grease only appropriate diamond circuit	Foreground production	per 1 kg reference flow
rough	Simple gemstone sawing and rough shaping	conditional	Only actual simple rough preparation before worked/polished gate	Foreground production	per 1 kg reference flow
controls	Mine water dust and residue controls	conditional	Actual treatment transfers and environmental releases	Foreground production	per 1 kg reference flow
dispatch	Rough-stone grading and dispatch	required	Every selected product gate with weighed accepted parcel	Foreground production	per 1 kg reference flow

Process: Gem-deposit development and rehabilitation (`development`)

Inputs

Product flows

Gem-mine development diesel (`development_diesel`)

Actual earthworks/rehabilitation, lifetime allocation once; supplier/grade of diesel disclosed.

Selected flow: Diesel fuel 9d258d75-6792-4f1c-9856-81602ed8f816
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_development_diesel; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_development_diesel
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Process: Natural gemstone extraction (`extraction`)

Inputs

Product flows

Gemstone extraction diesel (`mining_diesel`)

Actual excavating/loading/onsite hauling/dredge fuel; manual extraction does not assume mechanized use.

Selected flow: Diesel fuel 9d258d75-6792-4f1c-9856-81602ed8f816
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_mining_diesel; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_mining_diesel
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Gemstone mining electricity (`mining_power`)

Actual mining pumping/ventilation, with supplier geography/voltage declared; no universal power demand. This UUID only matches CN1–35kV grid-average alternating-current consumption mix delivered to user; resolve another flow for any other supply.

Selected flow: Alternating current 3d76981f-964a-4865-b588-0e067a2a1163
Flow property / unit: Net calorific value / MJ
Amount rule: Collect the attributable reporting-period quantity under cp_mining_power; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_mining_power
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Ammonium-nitrate fuel-oil explosive (`anfo`)

Only actual appropriate blasted host-rock route; fragile crystal/manual/placer routes do not force explosive; other explosives separate.

Selected flow: Ammonium-nitrate fuel-oil explosive
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_anfo; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_anfo
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Elementary flows

Natural diamond in geological deposit (`diamond_resource`)

Actual primary or placer diamond resource; grade sorting separates nonindustrial product.

Selected flow: Natural diamond in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_diamond_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_diamond_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural corundum in geological deposit (`corundum_resource`)

Only actual ruby/sapphire corundum resource; no industrial corundum automatically accepted as gem.

Selected flow: Natural corundum in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_corundum_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_corundum_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural beryl in geological deposit (`beryl_resource`)

Only actual emerald/aquamarine beryl resource and identified variety.

Selected flow: Natural beryl in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_beryl_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_beryl_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural quartz in geological deposit (`quartz_resource`)

Only actual gem quartz resource with selected variety, not all silica feed.

Selected flow: Natural quartz in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_quartz_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_quartz_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural almandine in geological deposit (`almandine_resource`)

Only actual almandine gem recovery; every other garnet species separate.

Selected flow: Natural almandine in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_almandine_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_almandine_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural elbaite in geological deposit (`elbaite_resource`)

Only actual elbaite tourmaline gemstone; other tourmalines separate actual identities.

Selected flow: Natural elbaite in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_elbaite_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_elbaite_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural opal in geological deposit (`opal_resource`)

Only actual natural opal source retaining hydrated silica gem identity.

Selected flow: Natural opal in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_opal_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_opal_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural gem olivine in geological deposit (`olivine_resource`)

Only actual peridot olivine resource and measured variety/composition.

Selected flow: Natural gem olivine in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_olivine_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_olivine_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural labradorite in geological deposit (`labradorite_resource`)

Only actual labradorite gem extraction; other feldspar species separately.

Selected flow: Natural labradorite in geological deposit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_labradorite_resource; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_labradorite_resource
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Outputs

Waste flows

Gem-mine waste rock (`waste_rock`)

Actual nonproduct host-rock reject with tested composition and fate; overburden retained for closure separate.

Selected flow: Gem-mine waste rock
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_waste_rock; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_waste_rock
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Process: Gemstone washing and recovery (`recovery`)

Inputs

Product flows

Supplied natural rough nonindustrial diamond (`supplied_diamond`)

Only standalone supplied diamond lot with measured grade/mass and upstream provider; internal recovery cancels.

Selected flow: Supplied natural rough nonindustrial diamond
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_supplied_diamond; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_supplied_diamond
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Supplied natural rough sapphire (`supplied_sapphire`)

Only actual supplied sapphire lot; other supplied coloured stones each own atomic row and confirmed origin.

Selected flow: Supplied natural rough sapphire
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_supplied_sapphire; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_supplied_sapphire
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Purchased gemstone wash water (`wash_water`)

Only new externally supplied compatible process water; internal settled/reused water cancels, direct river intake separate.

Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_wash_water; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_wash_water
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Gemstone recovery electricity (`recovery_power`)

Actual wash/screen/sort and conditional host-rock liberation/meters; no forced crushing of every intact gem. This UUID only matches CN1–35kV grid-average alternating-current consumption mix delivered to user; resolve another flow for any other supply.

Selected flow: Alternating current 3d76981f-964a-4865-b588-0e067a2a1163
Flow property / unit: Net calorific value / MJ
Amount rule: Collect the attributable reporting-period quantity under cp_recovery_power; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_recovery_power
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Ferrosilicon dense-medium powder (`ferrosilicon`)

Only actual diamond DMS make-up powder; measured grade and loss, internal medium recycling not repeated purchased input.

Selected flow: Ferrosilicon dense-medium powder
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_ferrosilicon; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_ferrosilicon
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Petroleum-jelly diamond-recovery grease (`recovery_grease`)

Only actual confirmed petroleum-jelly formulation in grease-table circuit; other formulation distinct row; not forced for Xray-only or coloured gems.

Selected flow: Petroleum-jelly diamond-recovery grease
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_recovery_grease; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_recovery_grease
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Elementary flows

Freshwater abstracted from river (`river_water`)

Actual river intake with basin/season; other sources each specific resource, not purchased water counted twice.

Selected flow: Freshwater abstracted from river
Flow property / unit: Volume / m3
Amount rule: Collect the attributable reporting-period quantity under cp_river_water; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_river_water
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Outputs

Waste flows

Gem-recovery mineral tailings (`tailings`)

Actual washed/processed host-rock residue after recovered gems with dry solids/water and fate; do not infer zero gems in residue.

Selected flow: Gem-recovery mineral tailings
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_tailings; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_tailings
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Process: Simple gemstone sawing and rough shaping (`rough`)

Inputs

Product flows

Simple rough-stone preparation electricity (`saw_power`)

Only actual simple saw/cleave/brute/rough shaping, not faceting/polishing; unworked gate excludes absent operation. This UUID only matches CN1–35kV grid-average alternating-current consumption mix delivered to user; resolve another flow for any other supply.

Selected flow: Alternating current 3d76981f-964a-4865-b588-0e067a2a1163
Flow property / unit: Net calorific value / MJ
Amount rule: Collect the attributable reporting-period quantity under cp_saw_power; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_saw_power
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Diamond-segment gemstone saw blade (`diamond_saw`)

Actual consumed/worn saw assembly for simple cut; replacement mass/lifetime attributed once.

Selected flow: Diamond-segment gemstone saw blade
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_diamond_saw; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_diamond_saw
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Silicon carbide rough-shaping grit (`sic_grit`)

Only actual coarse rough-shaping grit within confirmed gate; final fine polishing excluded; other grit each separate.

Selected flow: Silicon carbide rough-shaping grit
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_sic_grit; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_sic_grit
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Industrial diamond sawing powder (`diamond_powder`)

Only actual individual saw abrasive consumable; industrial diamond is input rather than reference product, with provider burden; never natural gemstone resource.

Selected flow: Industrial diamond sawing powder
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_diamond_powder; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_diamond_powder
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Purchased simple-saw cooling water (`cut_water`)

Only actual new compatible process water not duplicated wash meter; dry/manual operation excludes absent input.

Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_cut_water; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_cut_water
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Outputs

Waste flows

Rough-gemstone sawing sludge (`saw_sludge`)

Actual waste transfer with gem/abrasive solids and water; recovered accepted fragment is product only with confirmed grade.

Selected flow: Rough-gemstone sawing sludge
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_saw_sludge; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_saw_sludge
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Process: Mine water dust and residue controls (`controls`)

Inputs

Product flows

Anionic polyacrylamide flocculant (`polyacrylamide`)

Only actual individual treatment polymer with active fraction; settling-only route does not assume chemical use.

Selected flow: Anionic polyacrylamide flocculant
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_polyacrylamide; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_polyacrylamide
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Gem-mine water and dust-control electricity (`control_power`)

Actual treatment/drainage/reuse/dust controls, avoiding duplicated recovery meters. This UUID only matches CN1–35kV grid-average alternating-current consumption mix delivered to user; resolve another flow for any other supply.

Selected flow: Alternating current 3d76981f-964a-4865-b588-0e067a2a1163
Flow property / unit: Net calorific value / MJ
Amount rule: Collect the attributable reporting-period quantity under cp_control_power; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_control_power
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Outputs

Waste flows

Gem-mine water-treatment sludge (`treatment_sludge`)

Actual removed silt/sludge with solids/chemical content and final fate; internal return not waste transfer.

Selected flow: Gem-mine water-treatment sludge
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_treatment_sludge; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_treatment_sludge
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Gem-mine wastewater transferred for treatment (`wastewater`)

Actual external treatment transfer with volume/quality; not simultaneously own receiving-water release.

Selected flow: Gem-mine wastewater transferred for treatment
Flow property / unit: Volume / m3
Amount rule: Collect the attributable reporting-period quantity under cp_wastewater; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_wastewater
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Elementary flows

Suspended mineral solids released to river water (`tss_water`)

Actual controlled receiving-compartment TSS with paired volume and concentration; managed sludge not emission.

Selected flow: Suspended mineral solids released to river water
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_tss_water; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_tss_water
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Mineral PM10 released to air (`pm10_air`)

Actual size-specific uncontrolled fraction after dust controls; coarse dust and captured material separate.

Selected flow: Mineral PM10 released to air
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_pm10_air; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_pm10_air
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Fossil carbon dioxide released to air (`co2_air`)

Actual foreground fossil fuel combustion, upstream counted once; no default chemical gemstone CO2.

Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_co2_air; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_co2_air
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Process: Rough-stone grading and dispatch (`dispatch`)

Inputs

Product flows

Polypropylene rough-stone container (`pp_container`)

Only actual consumed packaging allocated by reuse/lifetime, excluding net gemstone mass; other components each separate.

Selected flow: Polypropylene rough-stone container
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_pp_container; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_pp_container
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Included rough-stone delivery diesel (`delivery_diesel`)

Only expressly included actual foreground receipt delivery; provider road/air service separately without duplicated fuel.

Selected flow: Diesel fuel 9d258d75-6792-4f1c-9856-81602ed8f816
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_delivery_diesel; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_delivery_diesel
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Outputs

Product flows

Recovered natural industrial diamond (`industrial_diamond_coproduct`)

Only actual sorted accepted industrial co-output with independent specification/mass and allocation; excluded from nonindustrial reference D.

Selected flow: Recovered natural industrial diamond
Flow property / unit: Mass / kg
Amount rule: Collect the attributable reporting-period quantity under cp_industrial_diamond_coproduct; divide by D after stock, transfer and allocation reconciliation.
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_industrial_diamond_coproduct
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

Natural rough precious or semi-precious stone at compatible plant gate (`final_product`)

Confirmed category Product/Mass identity with unspecified treatment at plant is usable only with one declared natural mineral/variety, accepted rough state and compatible gate. It does not establish diamond-only route, purity, gem-quality recovery, mineral resource or supplier geography. Other delivery states need own confirmed identity.

Selected flow: Precious stones (including diamonds, but not industrial diamonds) and semi-precious stones, unworked or simply sawn or roughly shaped 33921725-a196-40db-9ddf-a6d3a2b9e3bc
Flow property / unit: Mass / kg
Amount rule: 1 kg
Value mode: foreground_record
Specificity: site_specific
Normalization basis: per 1 kg reference flow
Basis kind: reference_flow
Evidence kind: collected_record
Collection protocol: cp_output
Sources: cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_hierarchy	joint production	Prefer process subdivision or defensible system expansion; otherwise use demonstrated physical causality. Use economic allocation only with consistent period, price, currency and sensitivity when physical causality is unavailable. Retain the unallocated inventory.	`ef-allocation-2021`
allocation_product	reference and co-products	Subdivide actual benches/deposits, recovery lines and independently handled mineral/grade lots. Retain unallocated joint inventories for accepted gem varieties, grades and industrial-diamond co-output. Gem mass alone does not establish physical causality across radically different grades; use measured causal relationships where defensible, otherwise documented grade-specific gate prices, quantities, currency and period for economic allocation with price/quality sensitivity. Never invent gem prices or infer value from stone count. Recovered old-tailings or supplied stones carry actual supplier burdens or justified cut-off and collection/processing burdens, not automatic zero. Allocate attributable development, tailings rehabilitation and closure once over measured lifetime accepted outputs. Reject or unusable fragment is not a co-product merely because it may be sold; confirm spec/fate. No default avoided gemstone, aggregate, disposal or jewellery credits.
allocation_waste	waste and recycling	Classify each output by physical state and actual fate. A sale does not automatically make a residue a co-product; internal recycling receives no avoided-product credit. Apply treatment burdens once.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_development_diesel	development	`development_diesel`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_diamond_resource	extraction	`diamond_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_corundum_resource	extraction	`corundum_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_beryl_resource	extraction	`beryl_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_quartz_resource	extraction	`quartz_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_almandine_resource	extraction	`almandine_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_elbaite_resource	extraction	`elbaite_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_opal_resource	extraction	`opal_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_olivine_resource	extraction	`olivine_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_labradorite_resource	extraction	`labradorite_resource`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_mining_diesel	extraction	`mining_diesel`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_mining_power	extraction	`mining_power`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	MJ	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_anfo	extraction	`anfo`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_waste_rock	extraction	`waste_rock`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Match independently weighed/estimated-with-uncertainty wet and dry residue mass, moisture, mineral phases, possible retained gems/abrasives and final management for same feed/output period. Gem recovery residual cannot be used to invent a product output or universal recovery rate.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_supplied_diamond	recovery	`supplied_diamond`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Independently calibrated clean net parcel mass at declared gate, excluding measured surface free water without altering structural water or damaging opal/other fragile stones; document variety, natural origin, rough processing, grade, size distribution, counted pieces, rejected/broken stones and opening/closing stocks. D is independently measured positive accepted selected-grade kg; metric-carats convert kg=ct0.0002 and grams kg=g0.001 for the exact same parcels. Count is supplementary, not a mass denominator; paired individual/parcel weights required for any count conversion.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_supplied_sapphire	recovery	`supplied_sapphire`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Independently calibrated clean net parcel mass at declared gate, excluding measured surface free water without altering structural water or damaging opal/other fragile stones; document variety, natural origin, rough processing, grade, size distribution, counted pieces, rejected/broken stones and opening/closing stocks. D is independently measured positive accepted selected-grade kg; metric-carats convert kg=ct0.0002 and grams kg=g0.001 for the exact same parcels. Count is supplementary, not a mass denominator; paired individual/parcel weights required for any count conversion.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_wash_water	recovery	`wash_water`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_river_water	recovery	`river_water`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	m3	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_recovery_power	recovery	`recovery_power`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	MJ	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_ferrosilicon	recovery	`ferrosilicon`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Record actual individual supplier formulation, composition and active/solid fraction, net consumed kg, stock changes, internally recovered fraction, water and fate for matched circuit/period. Material amount counts only new consumption; no fixed recipe or recycled medium counted again.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_recovery_grease	recovery	`recovery_grease`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Record actual individual supplier formulation, composition and active/solid fraction, net consumed kg, stock changes, internally recovered fraction, water and fate for matched circuit/period. Material amount counts only new consumption; no fixed recipe or recycled medium counted again.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_tailings	recovery	`tailings`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Match independently weighed/estimated-with-uncertainty wet and dry residue mass, moisture, mineral phases, possible retained gems/abrasives and final management for same feed/output period. Gem recovery residual cannot be used to invent a product output or universal recovery rate.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_saw_power	rough	`saw_power`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	MJ	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_diamond_saw	rough	`diamond_saw`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_sic_grit	rough	`sic_grit`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Record actual individual supplier formulation, composition and active/solid fraction, net consumed kg, stock changes, internally recovered fraction, water and fate for matched circuit/period. Material amount counts only new consumption; no fixed recipe or recycled medium counted again.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_diamond_powder	rough	`diamond_powder`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Record actual individual supplier formulation, composition and active/solid fraction, net consumed kg, stock changes, internally recovered fraction, water and fate for matched circuit/period. Material amount counts only new consumption; no fixed recipe or recycled medium counted again.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_cut_water	rough	`cut_water`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_saw_sludge	rough	`saw_sludge`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Match independently weighed/estimated-with-uncertainty wet and dry residue mass, moisture, mineral phases, possible retained gems/abrasives and final management for same feed/output period. Gem recovery residual cannot be used to invent a product output or universal recovery rate.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_polyacrylamide	controls	`polyacrylamide`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Record actual individual supplier formulation, composition and active/solid fraction, net consumed kg, stock changes, internally recovered fraction, water and fate for matched circuit/period. Material amount counts only new consumption; no fixed recipe or recycled medium counted again.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_control_power	controls	`control_power`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	MJ	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_treatment_sludge	controls	`treatment_sludge`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Match independently weighed/estimated-with-uncertainty wet and dry residue mass, moisture, mineral phases, possible retained gems/abrasives and final management for same feed/output period. Gem recovery residual cannot be used to invent a product output or universal recovery rate.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_wastewater	controls	`wastewater`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	m3	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_tss_water	controls	`tss_water`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Matched net discharge V m3 and TSS concentration C mg/L give kg=C*V/1000; preserve background, mineral composition, site/season, receiving compartment, sampler and uncertainty. Each additional dissolved pollutant is its own atomic row.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_pm10_air	controls	`pm10_air`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_co2_air	controls	`co2_air`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_pp_container	dispatch	`pp_container`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_delivery_diesel	dispatch	`delivery_diesel`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Calibrated weighing, metering or traceable transfer records; reconcile period, opening/closing stock, actual grade and boundary.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_industrial_diamond_coproduct	dispatch	`industrial_diamond_coproduct`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Independently calibrated clean net parcel mass at declared gate, excluding measured surface free water without altering structural water or damaging opal/other fragile stones; document variety, natural origin, rough processing, grade, size distribution, counted pieces, rejected/broken stones and opening/closing stocks. D is independently measured positive accepted selected-grade kg; metric-carats convert kg=ct0.0002 and grams kg=g0.001 for the exact same parcels. Count is supplementary, not a mass denominator; paired individual/parcel weights required for any count conversion.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty
cp_output	dispatch	`final_product`	measurement_record	period; site; amount; original unit; uncertainty; stock changes; route condition; allocation; D; product qualifiers	Independently calibrated clean net parcel mass at declared gate, excluding measured surface free water without altering structural water or damaging opal/other fragile stones; document variety, natural origin, rough processing, grade, size distribution, counted pieces, rejected/broken stones and opening/closing stocks. D is independently measured positive accepted selected-grade kg; metric-carats convert kg=ct0.0002 and grams kg=g0.001 for the exact same parcels. Count is supplementary, not a mass denominator; paired individual/parcel weights required for any count conversion.	kg	Each meter interval or shipment; monthly reconciliation	Complete year or justified representative production campaign	One identified natural mineral/variety and accepted nonindustrial rough grade, clean net stone mass excluding attached gangue, free water, grease, packaging and rejected pieces; declared mine/recovery or compatible plant gate	per 1 kg reference flow	Calibration; original records; assay; balance residuals; uncertainty

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalization	all cards	Exchange = attributable period quantity / D. Reconcile inventories and cancel internal transfers before aggregation.	cp_output; row-specific cp records	per 1 kg reference flow
physical_balance	production	D is positive independently calibrated accepted net gemstone mass kg for exactly the selected mineral/variety and grade at gate, excluding gangue, free water, adhering grease, packaging, rejects and returns. Do not infer D from ore grade, ore input or theoretical recovery. Sum independently weighed accepted parcels with stock reconciliation. Metric1 ct=0.2g=0.0002kg,1g=0.001kg: D=sum accepted carats*0.0002 when the same parcels are weighed in metric carats; verify balance resolution/calibration and round only after aggregation. Count cannot convert to kg without measured parcel weights or actual grade/size-specific mean mass and its uncertainty; no generic gem size/weight. Reconcile feed, retained rough stones, co-grades, industrial stones, fragments/dust, host-rock rejects/tailings, internal rescreening and stocks, without equating host-rock dry mass to pure gems. Keep ore/water mass balances separate from the sparse gemstone mass balance and reconcile uncertainty/detection limits. Record actual sawing loss/breakage per variety and shape; no universal recovery or finished-gem yield.	Matched mass, volume, composition and stock measurements	Balance residual and uncertainty

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
representativeness	dataset	Use matching production and exchange periods, actual technology, geography and supplier state. Record startup, shutdown, seasonal variation and substitutions.	collection records
identity_and_ranges	all cards	Unresolved identities and missing independent range evidence remain explicit. Do not replace measurement by a guessed industry range or by missing-as-zero.	manifest review metadata

9. Validation Rules

rule_id	Applies to	Rule
validate_reference	final_product	Verify 1 kg, positive D, product state, property/unit and every required qualifier. Each dataset fixes one product and route.
validate_balance	site	D is positive independently calibrated accepted net gemstone mass kg for exactly the selected mineral/variety and grade at gate, excluding gangue, free water, adhering grease, packaging, rejects and returns. Do not infer D from ore grade, ore input or theoretical recovery. Sum independently weighed accepted parcels with stock reconciliation. Metric1 ct=0.2g=0.0002kg,1g=0.001kg: D=sum accepted carats*0.0002 when the same parcels are weighed in metric carats; verify balance resolution/calibration and round only after aggregation. Count cannot convert to kg without measured parcel weights or actual grade/size-specific mean mass and its uncertainty; no generic gem size/weight. Reconcile feed, retained rough stones, co-grades, industrial stones, fragments/dust, host-rock rejects/tailings, internal rescreening and stocks, without equating host-rock dry mass to pure gems. Keep ore/water mass balances separate from the sparse gemstone mass balance and reconcile uncertainty/detection limits. Record actual sawing loss/breakage per variety and shape; no universal recovery or finished-gem yield.
validate_coverage	handoff	Verify each applicable exchange, its provider or environmental compartment and final waste fate; identify skipped checks, unresolved identities, missing measurements and upstream gaps. Errors or unassessed mandatory coverage cannot be labelled complete.

10. Published Dataset Profile

Field	Value
dataset_role	foreground_dataset
downstream_use	secondary_dataset; background_dataset
allowed_use	Supply 1 kg accepted net rough natural gemstone in one identified variety and grade at selected gate; retain measured metric carats and piece counts as supplementary characteristics, not interchangeable product quality
excluded_use	Industrial diamonds as reference output; synthetic or reconstructed unworked stones; natural/cultured pearls; otherwise worked polished/faceted gems, beads, jewellery or mounted/strung articles; gem dust/powder as reference product; treated/formulated composite stones outside confirmed rough category; downstream use and transport-only services
required_metadata	site/year and origin/custody; natural mineral/variety and nonindustrial status; actual primary/placer/supplied-stone route; grade, size distribution, piece count and net mass; unworked or actual simple saw/cleave/rough state; actual enhancement declaration and category check; product gate/transport included; measured gangue/water/grease exclusion; reject/breakage and stocks; supplier burden and economic/physical allocation; each consumable formulation; basin/discharge/waste fate; lifetime development/closure. Category Product/Mass UUID is only compatible natural rough plant state, not geology, pearls, synthetic or finished stones. Electricity identity is only CN1–35kV grid-average consumer supply when matched; other geographies/voltages/providers require distinct identities
required_quality_disclosure	Identity and measurement gaps; boundary coverage; uncertainty; allocation; temporal and geographical representativeness
update_trigger	Changed product, route, yield, supply, waste fate, site or representative period

11. Data Sources

Source id	Type	Reference	Used for
cpc-gems-2025	official_guidance	UNSD CPC Version3.0 Explanatory Notes,30June2025, original PDFpp.61,164,189, subclasses16310/16320/34560/38210/38220. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	Full rough natural precious/semiprecious category; synthetic/reconstructed unworked stones, pearls and further worked gems are separately named categories. No universal process route.
wco-gems-2022	official_guidance	WCO HS Nomenclature2022 Chapter71, original PDFp.3 headings7101–7104. https://www.wcoomd.org/-/media/wco/public/global/pdf/topics/nomenclature/instruments-and-tools/hs-nomenclature-2022/2022/1471_2022e.pdf?la=en	Rough versus worked natural diamonds/coloured stones, industrial/nonindustrial distinction and separate pearls/synthetic stones. Classification boundaries only, no new HS mapping.
ngja-gem-mining	official_guidance	Sri Lanka National Gem and Jewellery Authority, Gemstone Mining Industry, original webpage snapshot1October2026, mining methods, mining areas, environmental friendly mining and rehabilitation paragraphs. https://ngja.gov.lk/gems/gemstone-mining-industry/	Conditional coloured-gem pit/tunnel/placer/dredging, wash-water settling/reuse and separate overburden rehabilitation; Sri Lankan examples do not fix every gemstone route or imply zero impact.
gia-diavik-2016	literature	Shigley et al., Mining Diamonds in the Canadian Arctic: The Diavik Mine, Gems and Gemology Summer2016, original PDFpp.21–23 / printedpp.120–122, Figure20. https://www.gia.edu/doc/Summer-2016-Gems-Gemology-v5.pdf	One primary-diamond case: crushing/scrubbing/sizing, ferrosilicon DMS recycling, Xray/grease recovery and weighed sorted rough parcels. No Diavik grade, recovery, intensity or gem-price default.
nist-carat	official_guidance	NIST Office of Weights and Measures, Precious Metals Conversion Information, first substantive paragraph, original snapshot1October2026. https://www.nist.gov/pml/owm/metric-si/unit-conversion/precious-metals-conversion-information	Metric gemstone carat mass conversion0.2g /200mg; not precious-metal purity karat or a count-to-mass factor.
cpc3-notes-2025	official_guidance	UNSD, CPC Version 3.0 Explanatory Notes, 30 June 2025. https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	Classification scope only; no process quantities.
ef-allocation-2021	official_guidance	Commission Recommendation (EU) 2021/2279, Annex I section 4.5, consolidated 30 December 2021. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02021H2279-20211230	Multifunctionality hierarchy; not a claim of complete PEF conformity.

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structured.yaml107 KB · e631bc5a6594…

Structured rule index

This index comes from verified structured.yaml and retains the canonical English rule text.

System boundary rules · 3

Rule ID	Applies to	Rule	Source IDs
`boundary_operations`	site	Supply of natural precious and semi-precious stones, including nonindustrial diamonds, in an unworked, simply sawn/cleaved/bruted or roughly shaped state at one declared recovery, rough-preparation/loading or expressly included plant-receipt gate. Cover nonindustrial diamond and actual natural coloured-stone grades such as ruby/sapphire, emerald/aquamarine, quartz varieties, garnet, tourmaline, peridot, feldspar and opal; each dataset fixes an identified mineral/variety and accepted rough grade rather than averaging every stone. Actual routes include primary rock or pegmatite extraction, eluvial/residual/placer recovery, manual or mechanized washing/screening/sorting, conditionally appropriate host-rock liberation and concentration, and standalone preparation of supplied qualified natural stones. Primary-diamond dense-medium/Xray/grease recovery is one conditional route, not a recipe for fragile coloured crystals or every placer. Record actual deposit, grade-preserving recovery, supplies, water controls and attributable development/rehabilitation. Rough gate includes only actually performed simple sawing/cleaving/rough shaping; unworked product excludes absent operations. Faceting, polishing, drilling bead holes, final cabochon manufacture, mounting/stringing and finished jewellery are outside. Synthetic or reconstructed unworked gems are separately named CPC34560 and HS7104, not assumed natural because their chemistry resembles a stone; cultivated pearls and natural pearls have separate identities. Heat/dye/impregnation or other treatment exceeding the declared unworked/simple rough state requires a separate boundary/category review, not forced gemstone recovery. Industrial-diamond or abrasive grades are separately classified and may be joint outputs, not this reference product. Unsorted mixed diamond recovery must be graded and partitioned before claiming one accepted nonindustrial output.	cpc-gems-2025, wco-gems-2022, ngja-gem-mining, gia-diavik-2016, nist-carat
`boundary_partition`	all exchanges	Include actual conditioning, storage, handling and pollution controls through the declared gate. Account for attributable construction and closure with a disclosed lifetime-output basis or justified exclusion and sensitivity. Separate purchased fuel supply from foreground combustion and purchased treatment from site releases.
`boundary_completeness`	inventory	Cards define individual likely exchanges and route conditions, not an exhaustive site audit. Add each actual absent chemical, waste, resource, land transformation and pollutant as its own row. Absence, measured zero and unknown must be distinguished.

Allocation rules · 3

Rule ID	Applies to	Rule	Source IDs
`allocation_hierarchy`	joint production	Prefer process subdivision or defensible system expansion; otherwise use demonstrated physical causality. Use economic allocation only with consistent period, price, currency and sensitivity when physical causality is unavailable. Retain the unallocated inventory.	ef-allocation-2021
`allocation_product`	reference and co-products	Subdivide actual benches/deposits, recovery lines and independently handled mineral/grade lots. Retain unallocated joint inventories for accepted gem varieties, grades and industrial-diamond co-output. Gem mass alone does not establish physical causality across radically different grades; use measured causal relationships where defensible, otherwise documented grade-specific gate prices, quantities, currency and period for economic allocation with price/quality sensitivity. Never invent gem prices or infer value from stone count. Recovered old-tailings or supplied stones carry actual supplier burdens or justified cut-off and collection/processing burdens, not automatic zero. Allocate attributable development, tailings rehabilitation and closure once over measured lifetime accepted outputs. Reject or unusable fragment is not a co-product merely because it may be sold; confirm spec/fate. No default avoided gemstone, aggregate, disposal or jewellery credits.
`allocation_waste`	waste and recycling	Classify each output by physical state and actual fate. A sale does not automatically make a residue a co-product; internal recycling receives no avoided-product credit. Apply treatment burdens once.

Validation rules · 3

Rule ID	Applies to	Rule
`validate_reference`	final_product	Verify 1 kg, positive D, product state, property/unit and every required qualifier. Each dataset fixes one product and route.
`validate_balance`	site	D is positive independently calibrated accepted net gemstone mass kg for exactly the selected mineral/variety and grade at gate, excluding gangue, free water, adhering grease, packaging, rejects and returns. Do not infer D from ore grade, ore input or theoretical recovery. Sum independently weighed accepted parcels with stock reconciliation. Metric1 ct=0.2g=0.0002kg,1g=0.001kg: D=sum accepted carats*0.0002 when the same parcels are weighed in metric carats; verify balance resolution/calibration and round only after aggregation. Count cannot convert to kg without measured parcel weights or actual grade/size-specific mean mass and its uncertainty; no generic gem size/weight. Reconcile feed, retained rough stones, co-grades, industrial stones, fragments/dust, host-rock rejects/tailings, internal rescreening and stocks, without equating host-rock dry mass to pure gems. Keep ore/water mass balances separate from the sparse gemstone mass balance and reconcile uncertainty/detection limits. Record actual sawing loss/breakage per variety and shape; no universal recovery or finished-gem yield.
`validate_coverage`	handoff	Verify each applicable exchange, its provider or environmental compartment and final waste fate; identify skipped checks, unresolved identities, missing measurements and upstream gaps. Errors or unassessed mandatory coverage cannot be labelled complete.

Processes and inputs/outputs · 6

Process ID	Process name	Input flows	Output flows
`development`	Gem-deposit development and rehabilitation	1	0
`extraction`	Natural gemstone extraction	12	1
`recovery`	Gemstone washing and recovery	7	1
`rough`	Simple gemstone sawing and rough shaping	5	1
`controls`	Mine water dust and residue controls	2	5
`dispatch`	Rough-stone grading and dispatch	2	2

Complete field inspector

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Precious and semi-precious stones, including nonindustrial diamonds, unworked or simply sawn or roughly shaped

Content languages

Readiness

Classification mapping

Source

1. Scope and Applicability

2. Product Category Identity

3. Reference Flow

4. Measurement and Unit Rules

5. System Boundary

Boundary Abstraction

6. Process Inventory Structure

Process Map

Process: Gem-deposit development and rehabilitation (development)

Inputs

Product flows

Gem-mine development diesel (development_diesel)

Process: Natural gemstone extraction (extraction)

Inputs

Product flows

Gemstone extraction diesel (mining_diesel)

Gemstone mining electricity (mining_power)

Ammonium-nitrate fuel-oil explosive (anfo)

Elementary flows

Natural diamond in geological deposit (diamond_resource)

Natural corundum in geological deposit (corundum_resource)

Natural beryl in geological deposit (beryl_resource)

Natural quartz in geological deposit (quartz_resource)

Natural almandine in geological deposit (almandine_resource)

Natural elbaite in geological deposit (elbaite_resource)

Natural opal in geological deposit (opal_resource)

Natural gem olivine in geological deposit (olivine_resource)

Natural labradorite in geological deposit (labradorite_resource)

Outputs

Waste flows

Gem-mine waste rock (waste_rock)

Process: Gemstone washing and recovery (recovery)

Inputs

Product flows

Supplied natural rough nonindustrial diamond (supplied_diamond)

Supplied natural rough sapphire (supplied_sapphire)

Purchased gemstone wash water (wash_water)

Gemstone recovery electricity (recovery_power)

Ferrosilicon dense-medium powder (ferrosilicon)

Petroleum-jelly diamond-recovery grease (recovery_grease)

Elementary flows

Freshwater abstracted from river (river_water)

Outputs

Waste flows

Gem-recovery mineral tailings (tailings)

Process: Simple gemstone sawing and rough shaping (rough)

Inputs

Product flows

Simple rough-stone preparation electricity (saw_power)

Diamond-segment gemstone saw blade (diamond_saw)

Silicon carbide rough-shaping grit (sic_grit)

Industrial diamond sawing powder (diamond_powder)

Purchased simple-saw cooling water (cut_water)

Outputs

Waste flows

Rough-gemstone sawing sludge (saw_sludge)

Process: Mine water dust and residue controls (controls)

Inputs

Product flows

Anionic polyacrylamide flocculant (polyacrylamide)

Gem-mine water and dust-control electricity (control_power)

Outputs

Waste flows

Gem-mine water-treatment sludge (treatment_sludge)

Gem-mine wastewater transferred for treatment (wastewater)

Elementary flows

Suspended mineral solids released to river water (tss_water)

Mineral PM10 released to air (pm10_air)

Fossil carbon dioxide released to air (co2_air)

Process: Rough-stone grading and dispatch (dispatch)

Inputs

Product flows

Polypropylene rough-stone container (pp_container)

Included rough-stone delivery diesel (delivery_diesel)

Outputs

Process: Gem-deposit development and rehabilitation (`development`)

Gem-mine development diesel (`development_diesel`)

Process: Natural gemstone extraction (`extraction`)

Gemstone extraction diesel (`mining_diesel`)

Gemstone mining electricity (`mining_power`)

Ammonium-nitrate fuel-oil explosive (`anfo`)

Natural diamond in geological deposit (`diamond_resource`)

Natural corundum in geological deposit (`corundum_resource`)

Natural beryl in geological deposit (`beryl_resource`)

Natural quartz in geological deposit (`quartz_resource`)

Natural almandine in geological deposit (`almandine_resource`)

Natural elbaite in geological deposit (`elbaite_resource`)

Natural opal in geological deposit (`opal_resource`)

Natural gem olivine in geological deposit (`olivine_resource`)

Natural labradorite in geological deposit (`labradorite_resource`)

Gem-mine waste rock (`waste_rock`)

Process: Gemstone washing and recovery (`recovery`)

Supplied natural rough nonindustrial diamond (`supplied_diamond`)

Supplied natural rough sapphire (`supplied_sapphire`)

Purchased gemstone wash water (`wash_water`)

Gemstone recovery electricity (`recovery_power`)

Ferrosilicon dense-medium powder (`ferrosilicon`)

Petroleum-jelly diamond-recovery grease (`recovery_grease`)

Freshwater abstracted from river (`river_water`)

Gem-recovery mineral tailings (`tailings`)

Process: Simple gemstone sawing and rough shaping (`rough`)

Simple rough-stone preparation electricity (`saw_power`)

Diamond-segment gemstone saw blade (`diamond_saw`)

Silicon carbide rough-shaping grit (`sic_grit`)

Industrial diamond sawing powder (`diamond_powder`)

Purchased simple-saw cooling water (`cut_water`)

Rough-gemstone sawing sludge (`saw_sludge`)

Process: Mine water dust and residue controls (`controls`)

Anionic polyacrylamide flocculant (`polyacrylamide`)

Gem-mine water and dust-control electricity (`control_power`)

Gem-mine water-treatment sludge (`treatment_sludge`)

Gem-mine wastewater transferred for treatment (`wastewater`)

Suspended mineral solids released to river water (`tss_water`)

Mineral PM10 released to air (`pm10_air`)

Fossil carbon dioxide released to air (`co2_air`)

Process: Rough-stone grading and dispatch (`dispatch`)

Polypropylene rough-stone container (`pp_container`)

Included rough-stone delivery diesel (`delivery_diesel`)

Recovered natural industrial diamond (`industrial_diamond_coproduct`)

Natural rough precious or semi-precious stone at compatible plant gate (`final_product`)