The diamond market, measured.
Caratlytics publishes the methodology, the grade scale and the price index behind the Caratlytics Score: a single 0 to 100 measure of a diamond's quality, value, certification and market position, computed for every certified stone we observe across more than one hundred retailers.
Four pillars, one score.
Every Caratlytics Score is a weighted composite of four published sub-scores. No hidden factors, no paid placement, no retailer input.
The grade scale
Scores map to six consumer grades. The bands are fixed, published and identical everywhere the score appears.
Retail diamond prices, monthly.
A monthly, openly licensed index of retail diamond prices: median USD per carat for natural and lab-grown diamonds, computed from a systematic sample of millions of listings.
Sample: systematic 1 in 10 of listings, each contributing its most recent observed price in the calendar month. Unit: USD per carat under pinned conversion rates, so the series moves when retailers reprice, never on currency fluctuations. Series begins December 2025; releases are immutable once published.
Grading tells you what a stone is. It does not tell you whether the price is fair.
Diamond grading does not tell you whether the same certificate is listed cheaper elsewhere, or whether a retailer's data can be trusted. The Caratlytics Score adds that market layer, and this site is its public record.
Caratlytics is developed by the team behind Carat Hunter, the diamond search engine where the score is applied to live inventory. We publish the full methodology so anyone can inspect it, challenge it and hold us to it.
Have a certificate in hand?
Compute an indicative quality grade in your browser. No account, no upload.