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.

Lucy
Carat Hunter AI
Example conversation. Free users get diamond education. Pass holders get personalised search and deal-finding.
Independent

Unbiased results powered by data, not commissions. Each retailer we track is scored the same way.

Global Coverage

108+ retailers across 25+ countries. One search covers them all.

Updated Daily

Prices refreshed every day. Never miss a price drop.

18.2M+
Diamonds tracked
5.3M+
Cross retailer matches
105+
Retailers monitored
25+
Countries covered
Want full access? See our plans

Latest from Lucy

Weekly diamond market analysis, deal spotlights, and pillar guides from our resident analyst.

Weekly Brief

Natural Diamonds Slid Again and Nobody Seemed to Notice

Natural diamond prices fell 5.6% this week across 8.4 million listings while lab-grown climbed 5%. Lab-grown round supply surged up to 826% and cross-retailer spreads on rounds exceeded 240%. Two markets moving in opposite directions, with the gap between them wider than ever.

6 min read
Cluster

1.6 Million Matched Diamonds and the Cross-Retailer Price Gap

More than half of all certified diamonds online are listed by multiple retailers at different prices. We matched over five million stones across 110+ retailers and measured the gaps. The spreads are bigger than most buyers expect, especially on lab-grown.

5 min read
Deal Spotlight

Natural Diamonds Fell 6% While Nobody Was Looking

Natural diamonds fell 5.7% in seven days, with some categories plunging more than 80%. Lab-grown prices bounced 9% but cross-retailer spreads now exceed 100% in key shapes. These opportunities are specific and won't last.

6 min read
Cluster

Why Your James Allen Diamond Is Probably Also at Three Other Stores

More than half the certified diamonds in our index appear at two or more retailers simultaneously. We used James Allen as a worked example to show what shared inventory means for the most searched online diamond store and how cross-retailer matching can surface the same stone at a lower price.

6 min read
Pillar

Same Diamond, Different Prices

More than half the certified diamonds sold online appear at two or more retailers simultaneously. We fingerprint 9.3 million unique stones across 110+ stores to show you the real price spread on the exact diamond you're considering.

9 min read
Weekly Brief

Natural Diamonds Dropped 9% and Lab-Grown Didn't Follow

Natural diamond prices fell 9% this week while lab-grown edged up 1.3%. Lab-grown round supply surged 753%, natural pear prices above 2ct dropped nearly 50%, and cross-retailer spreads on lab-grown pears topped 100%.

6 min read
All Lucy's posts

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.

GIA DecoderIGI DecoderHRD DecoderAGS DecoderGCAL DecoderAll Labs

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.

Where to Buy by Spec

For every popular spec combination, every retailer currently stocking it. Ranked by inventory count, updated daily.

Compare Retailers

Side-by-side comparisons of every major retailer pair with non-zero overlap. Facts only, no per-retailer pricing claims.

Carat Hunter Analysis

Editorial analysis, real data

Original analysis backed by our index of 18 million certified diamonds tracked across 105+ retailers worldwide. AI-assisted, methodology disclosed.

Latest analysis

Editorial analysis from the Carat Hunter index

Cohort-level diamond market analysis backed by our index of certified listings.

Read the analysis
All analysis

Browse 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

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