Standard 2.2 (draft): scores for this category will appear once its release checks are complete. Any scores shown above this section were calculated under an earlier version of the Standard and will be replaced.
Jewellery: how the Throne Standard is calculated
Pack: Jewellery 1.0.0 · Standard 2.2.0 (draft) · Engine: Pillar · Status: Experimental, scores not yet published
Jewellery is scored on metal sourcing, stone sourcing, hazard, durability and transparency.
Criteria, weights and evidence levels| Criterion | Weight | Level 2 | Level 3 | Level 4 |
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| Metal sourcing | 35 | to be written | to be written | to be written |
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| Stone sourcing | 25 | to be written | to be written | to be written |
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| Hazardous substances | 20 | to be written | to be written | to be written |
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| Durability and repairability | 10 | to be written | to be written | to be written |
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| Transparency and certification | 10 | to be written | to be written | to be written |
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Level 0 is dated contrary evidence, or a source we read that shows the practice is absent. Level 1 is a claim with no supporting evidence. A criterion whose source was not found, not read or blocked is unknown, which is different from 0. A certificate is checked for holder, scope, validity and product coverage; "free from" wording is level 1 until a test report or scoped certificate backs it.
The calculation
V = 25 × S ÷ W, where S = sum of (weight × level) and W = sum of evidenced weights
- Each level earns a quarter of the criterion's credit per step: level 4 is full credit, level 1 a quarter.
- Coverage C = 100 × W ÷ total applicable weight. Below 70% the item is unresolved; below 85% it is capped at 89.99 (3/5).
- If less than half of the total applicable weight is at level 2 or above, the value is capped at 59.99 (2/5), so a page of claims cannot score well.
- Key criterion: metal sourcing. A 5/5 needs it at level 3 or above, otherwise the value is capped at 99.99.
- Exact integer band tests: 5/5 when S = 4W; 4/5 when 5S ≥ 18W; 3/5 when 5S ≥ 12W; 2/5 when 5S ≥ 8W; otherwise 1/5.
Bands (the same in every category)| Value | Band |
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| 100 | 5/5 |
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| 90 to below 100 | 4/5 |
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| 60 to below 90 | 3/5 |
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| 40 to below 60 | 2/5 |
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| 0 to below 40 | 1/5 |
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All arithmetic is exact (fractions, never rounded floating point). Nothing is rounded before the band test, and each band includes its lower bound. Values are shown cut to two decimals, never rounded up, so 89.996 shows as 89.99 and is 3/5.
Worked example: illustration
No jewellery item has been scored yet, so these evidence levels are illustrative. Every number below is computed by the scoring engine. The evidence levels for this category are still being written, so no jewellery item can be scored until they are published.
Illustration: a gold ring with a stone| Criterion | Weight | Evidence level | Weight × level |
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| Metal sourcing | 35 | 2 | 35 × 2 = 70 |
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| Stone sourcing | 25 | 2 | 25 × 2 = 50 |
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| Hazardous substances | 20 | 2 | 20 × 2 = 40 |
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| Durability and repairability | 10 | 3 | 10 × 3 = 30 |
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| Transparency and certification | 10 | 2 | 10 × 2 = 20 |
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Calculation| Step | Result |
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| Evidenced weight W | 100 |
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| Weighted sum S | 210 |
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| Coverage C = 100 × W ÷ applicable weight | 100 × 100 ÷ 100 = 100.00% |
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| Value V = 25 × S ÷ W | 25 × 210 ÷ 100 = 52.50 |
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| Result | value 52.50, band 2/5 |
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From products to a brand result
- Each parent product counts once. Sizes add no votes; variants with different complete declarations each count once and the parent takes their mean.
- The brand value is the plain mean of the unrounded product values, never weighted by price or sales. One result per category; never one overall brand score.
- A headline band needs at least 70% of eligible products assessed. Below that the result is shown as Partial, with no badge.
- Only a verified complete catalogue (a Census) can reach 5/5. Partial and sample results are capped at 4/5, and a Partial result shows its possible range, from every unresolved item at 0 to every unresolved item at 100.
- Unknown is never a fail. A missing, unread or conflicting record lowers coverage and is shown as a gap.
Evidence we use
Sourcing certificates, assay and test reports and product disclosures. Every record keeps its source address, exact locator, capture date and a SHA-256 hash of what we read. Evidence older than two years is re-checked before it supports a high level.
Why scores are not shown yet
Before any score in this category is published, the evidence levels 2 to 4 for each criterion are not yet written; no verified product has yet been confirmed at 5/5 with published evidence; the calibration run has not been reviewed and signed off; we have not yet shown that scores separate stronger from weaker products. Until then we show the evidence we have found, not a score.
Necklaces