About Carat Hunter
The diamond price comparison that retailers wish didn't exist.
We track 11.4M+ diamonds across 100+ retailers in 25+ countries. Same stone, different prices. We show you every one of them.
Why We Built This
Most online diamond retailers pull inventory from the same supplier networks. That means the exact same certified diamond, same GIA or IGI number, same physical stone, regularly appears at three, five, even ten different stores. Each retailer sets their own markup. And until recently, there was no practical way for a buyer to know.
We started Carat Hunter because we saw the gap firsthand. A 2 carat G VS2 Round listed at one store for $18,000 and at another for $27,000. Identical stone. The only difference was the retailer. The diamond industry has operated on information asymmetry for decades, and the internet only partially fixed it. Retailers got online, but comparison shopping across them remained nearly impossible.
So we built the tool we wished existed: a search engine that monitors every major online diamond retailer, matches the same stones by certificate number, and shows you exactly what each one charges. No commissions, no affiliate deals, no preferred partners. Just the data.
How It Works
Our systems re-read over 100 online diamond retailers, most of them daily, pulling inventory and pricing data from each. When the same certified diamond, matched by its GIA, IGI, or HRD certificate number, appears at more than one store, we flag it and show you every price side by side. Natural, lab grown, or both.
Most retailers are checked every day. When a retailer changes their price, adds new inventory, or removes a listing, we pick it up on our next read, and every price shows when we last confirmed it. The result is a picture of the diamond market that would take an individual buyer weeks to assemble manually.
What You Can Do
The Caratlytics Score
Beyond the traditional 4Cs (Cut, Colour, Clarity, Carat), every diamond on Carat Hunter gets a Caratlytics Score from 0 to 100. It combines four factors into a single number so you can compare diamonds at a glance:
The score is not meant to tell you what to buy. It is a quick way to spot diamonds that punch above their weight and avoid ones that do not.
Meet Lucy
Lucy is our diamond market analyst, and she's AI. She works from our index of over 11.4 million certified listings across more than 100 retailers. Ask her where a stone sits in its cohort, what the same cert costs at other sellers, or whether a spread looks off, and she'll pull the answer from our database.
Same AI runs our chat. Ask Lucy anything. "Best 2 carat round under $15,000", "is this diamond worth it?", "compare these three stones for me." She'll pull up real options and give you a straight read. No scripts, no upselling, no hedging. Named after "Lucy in the Sky with Diamonds" by the Beatles.
Completely Independent
We do not sell diamonds. We are not affiliated with any retailer, we do not take commissions, and we do not have preferred partners. Every retailer in our database is treated the same way. When we show you that a diamond is $4,000 cheaper at one store versus another, there is no incentive behind that other than giving you the information.
Our revenue comes from people who buy a Carat Hunter Pass, a one-time purchase that unlocks full retailer pricing, unlimited Lucy chat (fair use), price tracking and detailed reports. The free tier gives you search, scores and 2 free retailer unlocks. Either way, the data is the same.
How editorial content is produced
Carat Hunter editorial content is published under the Lucy byline. Lucy is AI, working from our index of over 11.4 million certified diamond listings across more than 100 retailers. The pipeline runs cohort queries, surfaces patterns in the data, and drafts prose.
Pieces run through automated checks before publication. When we find an error after a piece is live, we correct it in place and add a dated entry to the corrections log on the methodology page. View corrections log.
What the Data Shows
As of October 28, 2026. That is how much more the exact same certified stone costs at a typical retailer than at the cheapest: the median across every diamond listed by two or more retailers, each retailer at its cheapest recently confirmed price. Same certificate number, same specs, different retailer, different price.
Built in Australia
Carat Hunter is designed and built in Melbourne, Australia. We founded it in 2025 and launched it in 2026 with a simple idea: diamond buyers deserve the same price transparency that exists in almost every other market. The diamond industry is one of the last where a buyer can pay thousands more than they need to simply because they did not know to check elsewhere. We are working to change that.