Same diamond. Different prices. We help you find the best deal.

About Carat Hunter

What is Carat Hunter?

Carat Hunter is an independent diamond price-comparison platform that matches the same certified diamond across 125+ retailers, so a buyer can see every price for one stone in a single view. It tracks roughly 11.4 million natural and lab-grown diamonds across 25 or more countries. Most retailers are re-read daily and some less often, and every price shows the date we last saw it. Carat Hunter sells no diamonds and takes no affiliate commission, so its rankings come from inventory data rather than retailer relationships. The goal is simple: show the real price range for the exact stone you want, before you buy.

How does Carat Hunter compare diamond prices?

Every diamond is fingerprinted by its certificate number and physical measurements, then matched to the identical stone wherever else it is listed. Around 4.7 million cross-retailer matches exist where the same certified diamond is listed by more than one retailer. As of October 28, 2026, the same certified diamond typically costs 44% more at a typical retailer than at the cheapest for lab-grown stones, and 19% more for natural ones (the median across stones listed by two or more retailers). Comparing shows you the cheapest of the retailers listing the same stone.

What is the Caratlytics score?

The Caratlytics score is an independent rating from 0 to 100 that Carat Hunter calls the fifth C. It blends four inputs: gemological quality at 35%, value against the current market at 30%, certification strength at 20%, and cross-retailer market signals at 15%. A score near 90 means a well-cut, fairly-priced, lab-graded stone; a low score flags a diamond that is overpriced or thinly documented. The score is recomputed as prices and inventory change, so two diamonds rated 85 are directly comparable no matter which retailer lists them.

How does Carat Hunter check a diamond's origin?

Lab-grown and natural diamonds are chemically and optically identical, and retailers occasionally label a stone with the wrong origin. Carat Hunter cross-checks each certified diamond against the grading laboratory's own record, so a lab-grown stone listed as natural is caught and corrected instead of shown at a misleading natural price. Diamonds with an unresolved origin conflict are held out of natural-diamond search results until they are verified, which keeps the natural listings and their price baselines honest.