CaratHunter
Same diamond. Different prices. We help you find the best deal.
Compare prices across 100+ diamond retailers worldwide
See it in action
The same certified diamond can vary by thousands across different retailers. Here are some real live examples.
Pass holders see all retailer names and exact prices
How It Works
Four steps to finding your diamond for less.
1
Search your way
Paste a retailer URL, type what you want in plain English, explore with filters, use visual search, or ask Lucy our AI diamond expert.
2
Compare across retailers
We match the same certified diamond across 100+ retailers worldwide so you can compare your options side by side.
3
Diamonds scored by Caratlytics
Every listing gets a score from 0 to 100 based on quality, value, certification, and market data. Want the finest stone your budget allows? Switch to Quality First mode. Want the best overall deal? The default Balanced mode has you covered.
4
Choose with confidence
Compare prices, scores, and retailer options in one place. Average savings of $1,129 on a 1ct diamond when you shop around.
Meet Lucy
Your AI diamond expert. Search, compare, and find the best deal in conversation.
Independent
Unbiased results powered by data, not commissions. Each retailer we track is scored the same way.
Global Coverage
115+ retailers across 25+ countries. One search covers them all.
Updated Daily
Prices refreshed every day. Never miss a price drop.
21.7M+
Diamonds tracked
5.3M+
Cross retailer matches
115+
Retailers monitored
25+
Countries covered
Latest from Lucy
Weekly diamond market analysis, deal spotlights, and pillar guides from our resident analyst.
Pillar
The Retailer Markup Leaderboard Methodology and What 110 Retailers Look Like Side by Side
8 min read
Deep Dive
Lab Grown Pears Just Jumped 73% and You Should Probably Wait
6 min read
Cluster
What 'Uncertified' Really Means and Why We Penalise It
7 min read
Deal Spotlight
Cushion Cuts Are in Freefall and Nobody's Talking About It
6 min read
Weekly Brief
Natural diamonds dropped 8% this week and the bargains are getting ridiculous
5 min read
Cluster
GIA vs IGI for Lab-Grown Diamonds as the Price Gap Closes in 2026
5 min read
Explore the guides
Hand-built guides that cover the questions every diamond shopper actually asks.
The 4Cs Explained
Cut, colour, clarity, carat. What actually matters and where to spend your budget.
Diamond Shapes
Round, oval, cushion, princess and seven more. How shape changes price per carat.
Lab vs Natural
The 86.8% spread, why it exists, and which option fits your budget.
Estimate a Diamond
Live market price for any 4C combination across 100+ retailers.
Top Value Picks
Our highest-scoring stones for raw value, refreshed every hour.
Diamonds Under $50K
What a $50,000 budget really gets you in the current market.
Diamond market analysis
Editorial analysis grounded in our index of certified diamonds across more than 100 retailers
Diamond Insights Blog
Weekly market analysis and deal spotlights from Lucy.
Cert Decoder
Find a hidden certificate number from the specs you can see.
Best by Budget
Three curated picks at three price tiers within your budget, ranked by the Caratlytics score.
Decode any diamond certificate
Find a redacted or hidden cert number from the diamond's specs. Free, no sign-up.
Find every retailer for any spec
Thousands of live pages covering each shape, carat, colour and clarity combination. Plus side-by-side comparisons of every major retailer pair.
Carat Hunter Analysis
Editorial analysis, real data
Original analysis backed by our index of 22 million certified diamonds tracked across 115+ retailers worldwide. AI-assisted, methodology disclosed.
Latest analysis
Lab Grown Pears Just Jumped 73% and You Should Probably Wait
Lab-grown pear shapes in the 1.00 to 1.24ct range spiked 72.71% in seven days while the broader lab-grown market fell. With a cross-retailer spread exceeding 100%, the real opportunity isn't chasing the median. It's shopping smarter.
Read the analysis→
All analysisBrowse the analysis index
Cohort analyses on cross-retailer pricing, certification grading, lab-grown vs natural spreads, and more. AI-assisted, editor-reviewed, refresh dates on every piece.
Browse all→
Take Carat Hunter with you
The full diamond search, Lucy and instant hunt alerts on your phone, free for iPhone and Android.
Don't overpay. Start searching.
Popular searches
About Carat Hunter
What is Carat Hunter?
Carat Hunter is an independent diamond price-comparison platform that matches the same certified diamond across 115+ retailers, so a buyer can see every price for one stone in a single view. It tracks roughly 22 million natural and lab-grown diamonds across 25 or more countries, refreshed daily. 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 5.3 million cross-retailer matches exist where the same certified diamond is sold by more than one retailer, and the gap between the cheapest and most expensive seller of one stone averages 86.8% for lab-grown and 33.5% for natural diamonds. On a typical 1 carat diamond that spread is around $1,100 between sellers, and more on larger or higher-grade stones. That difference is money the buyer keeps simply by comparing the same diamond across retailers instead of trusting one quote.
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 live 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.
Common questions about Carat Hunter
Is Carat Hunter free to use?
Yes. Browsing diamonds, comparing prices across retailers, and reading the buying guides are free. A paid pass adds personalised search, price-drop alerts, and the full Lucy AI assistant.
Does Carat Hunter sell diamonds or earn commissions?
No. Carat Hunter is an independent comparison platform. It does not sell diamonds and earns no affiliate commission on retailer purchases, so its scores and rankings are not influenced by who pays.
Does it cover both lab-grown and natural diamonds?
Yes. It tracks roughly 22 million natural and lab-grown diamonds side by side, scored on the same scale, so you can compare the two directly at any spec and budget.
How often are diamond prices updated?
Inventory across the 115+ tracked retailers refreshes on rolling schedules through the day. Always confirm the final price with the retailer before buying.
What is Lucy?
Lucy is Carat Hunter's AI diamond assistant. Describe what you want in plain language and Lucy searches the index, compares matching stones, and surfaces the best-value options in conversation.
How much can comparing diamond prices save?
Because the same certified diamond often differs by 30% to more than 80% between retailers, comparing before you buy commonly saves around $1,100 on a 1 carat stone, and more on larger or higher-grade diamonds.