Natural industrial diamonds, unworked or simply sawn, cleaved or bruted; pumice, emery and other natural abrasives · Calculation Rules
- Lifecycle status
- Candidate
- Content maturity
- Authored methodology
- Current version
- No published versionLast updated
- 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 3.0:16320 · exact
Source
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 | Reconcile independently measured feed, accepted whole-product D, other accepted grades/co-minerals, waste rock, tailings/fines, dust, saw residue, water/evaporation and opening/closing stock on matched wet and dry-solids bases. kg_dry=kg_as_received*(1-free_moisture_fraction); mineral assay and structural water are separately measured, not subtracted as free water or substituted for whole-product D. Emery retains its natural phase mixture. Thermal treatment changes need actual mass/water/emission evidence, not a universal decomposition factor. Diamond metric carats convert kg=ct0.0002; grams kg=g0.001 for the same accepted parcels. Piece count cannot convert without measured paired weights. Measure accepted grade output independently, not as feed minus assumed waste or recovery. | 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 | source_ids |
|---|---|---|---|
| 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 | Reconcile independently measured feed, accepted whole-product D, other accepted grades/co-minerals, waste rock, tailings/fines, dust, saw residue, water/evaporation and opening/closing stock on matched wet and dry-solids bases. kg_dry=kg_as_received*(1-free_moisture_fraction); mineral assay and structural water are separately measured, not subtracted as free water or substituted for whole-product D. Emery retains its natural phase mixture. Thermal treatment changes need actual mass/water/emission evidence, not a universal decomposition factor. Diamond metric carats convert kg=ct0.0002; grams kg=g0.001 for the same accepted parcels. Piece count cannot convert without measured paired weights. Measure accepted grade output independently, not as feed minus assumed waste or recovery. | |
| 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 one independently accepted declared-grade natural industrial diamond or natural abrasive mineral/rock lot at the specified gate |
| excluded_use | Nonindustrial gem reference products; synthetic/reconstructed diamonds; artificial/fused/sintered corundum or other manufactured abrasives; diamond/gem dust and powder or further worked diamonds as reference; formulated bonded/coated abrasive articles and cleaning preparations; jewellery; nonmatching sand/diatomaceous earth/aggregate categories; downstream use |
| required_metadata | Natural origin; deposit/mineral or rock identity including emery phase mixture and garnet species; primary/placer/supplied route; actual processing and heat-treatment state; diamond industrial grade and permitted simple-cut state; accepted whole-product grade and size distribution; measured abrasive performance/contaminant specification where claimed; free moisture and structural-water basis; independent positive accepted D; gate/geography/period; provider/grid voltage; cutoff and equipment lifetime; outputs/allocation/waste fate. No assumed hardness, mineral purity, recovery, thermal recipe, price or yield. |
| 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 |
|---|---|---|---|
| wco-natural-abrasives-2022 | official_guidance | WCO HS Nomenclature2022 Chapter25, Note1 and heading2513, original PDFpp.1,3. https://www.wcoomd.org/-/media/wco/public/global/pdf/topics/nomenclature/instruments-and-tools/hs-nomenclature-2022/2022/0525_2022e.pdf?la=en | Natural abrasive crude/washed/crushed/ground/powdered and physical concentration states; heading2513 expressly admits heat treatment. No new HS mapping or synthetic/article inclusion. |
| wco-diamond-boundary-2022 | official_guidance | WCO HS Nomenclature2022 Chapter71, headings7102,7104,7105, original PDFpp.3–4. https://www.wcoomd.org/-/media/wco/public/global/pdf/topics/nomenclature/instruments-and-tools/hs-nomenclature-2022/2022/1471_2022e.pdf?la=en | Natural industrial diamonds unworked or simply sawn/cleaved/bruted; synthetic diamonds and diamond dust/powder separately named. |
| usgs-industrial-garnet-2006 | official_guidance | Evans and Moyle, U.S. Industrial Garnet, USGS Bulletin2209-L2006, original PDFp.15 / printedp.9, Barton Mines process paragraph. https://pubs.usgs.gov/bul/b2209-l/b2209l.pdf | Conditional garnet crushing/sizing, gravity/heavy-media/flotation separation, drying and heat treatment; site evidence required for medium/reagent identities. No historical grade, recovery, price, temperature or intensity default. |
| epa-natural-abrasives-1976 | official_guidance | EPA, Development Document for Interim Final Effluent Limitations Guidelines and Standards of Performance, Mineral Mining and Processing Industry, June1976, original PDFpp.80–81,124–125,213–214 / printedpp.71–72,117–118,206–207, Figures24,51. https://nepis.epa.gov/Exe/ZyPDF.cgi/2000JKPT.PDF?Dockey=2000JKPT.PDF | Natural corundum and mixed-mineral emery identity, simple pumice surface mining/screen-crush, primary/placer garnet wet/dry preparation and water/residue routes. Historical US cases do not establish universal zero impact, recipes or present intensities; limited emery/corundum route detail requires actual site records. |
| 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 natural-diamond host-rock recovery case: crush/scrub/screen, ferrosilicon DMS recycling, Xray and grease recovery and weighed sorted rough parcels. Industrial-grade partition must be measured; no case recovery/grade default or forced route for abrasives. |
| 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 | 1 metric carat=0.2g=200mg; mass conversion only, not quality, recovery or count conversion. |
| 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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