The Caratlytics Score and grade scale
One number from 0 to 100, presented as six grades. The same bands apply to every diamond, every retailer and every language, and they never move without a methodology version change.
Grade bands
Exceptional. Top decile stones with verified excellence across quality, price and trust.
Excellent. Strong on every pillar; minor trade-offs only.
Very good. A sound choice with some measurable compromises.
Good. Acceptable, with clear compromises in quality, price or data.
Average. Unremarkable on the evidence; better candidates usually exist in category.
Below average. Weak on multiple pillars or priced against the buyer.
Descriptive labels
Underneath the letter grades, the engine annotates raw scores with an eight step label used in analytical contexts.
| From score | Label |
|---|---|
| 90 | Exceptional |
| 80 | Excellent |
| 70 | Very Good |
| 60 | Good |
| 50 | Average |
| 40 | Below Average |
| 30 | Fair |
| 0 | Poor |
Indicative quality grade widget
Enter the data from a grading certificate and compute an indicative quality and certification score in your browser. Nothing is uploaded; the computation runs locally using a verified port of the production engine.
Indicative only. The full Caratlytics Score also weighs Value and Market, which require live market baselines and price history; those are computed on Carat Hunter. A 4Cs only input caps near 63 of 100 by design, because unverified evidence scores zero.
Questions and answers
What is a Caratlytics Score?
A 0 to 100 composite measure of a diamond listing, combining gemological quality (35%), price value (30%), certification trust (20%) and market intelligence (15%). It is computed by the Carat Hunter platform for every certified diamond it observes and its full methodology is published on this site.
Is Caratlytics independent of retailers?
Yes. Retailers cannot pay for scores, placement or index inclusion, and no retailer sees a score before it is published. Caratlytics is not independent of Carat Hunter: it is developed by the same team, and that common ownership is disclosed on every page.
Is the Caratlytics Score a grading report?
No. Grading is what laboratories like GIA and IGI do to the physical stone. The Caratlytics Score takes those grades as inputs and adds what laboratories do not measure: price positioning, data trust and market corroboration.
Why does a diamond show no score?
Usually the data coverage gate: when less than 60 percent of the weighted gemological evidence is present, the methodology refuses to issue a quality score rather than guess. Sparse listings are excluded from ranked results.
Can the same diamond have different scores at different retailers?
Yes, by design. Quality and certification attach to the stone, but value and market attach to the listing: the same certificate priced 2,000 USD apart at two retailers will score differently, and the cheaper listing scores higher.
Who pays for Caratlytics?
Carat Hunter funds it from consumer subscriptions. There are no affiliate commissions, no retailer fees and no advertising on this site. The funding model is documented on the governance page.