Always watching
Track the exact stone
Follow a certified diamond across retailers without reopening tabs or rebuilding your search.
Find the lowest priceon any diamondFind the lowestprice on anydiamond
Pick your specs or paste a certificate number. We check 20+ websites and rank every seller, cheapest first. Sign up for unlimited searches, and no retailer pays us.
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Free account · No card required
How it works
- 1
Search
Enter a certificate number for one exact stone, or a shape and carat range to compare many.
- 2
Compare
See every retailer carrying that certified stone, cheapest first, with the price difference spelled out.
- 3
Track
Save a search and get an email when the price drops or a new seller lists your stone.
Round · 2.5 ct · H · VS1
GIA 7458448956
Lowest$27,797at James Allensave $11,899
- James Allen$27,797best
- Luvansh$29,085+$1,288
- Ritani$29,797+$2,000
- Whiteflash$30,483+$2,686
- Brian Gavin Diamonds$30,903+$3,106
- Brilliance$31,200+$3,403
Your diamond search,
working in the background.
Save the stone once. CaratRank keeps watching retailer prices and tells you when it is worth taking another look.
Right on time
Know when the price drops
Get a clear alert when your stone gets cheaper or a new seller enters with a better offer.
Choose your unlock
Unlock every paid tool
Fit scoring, saved stones, full price history, and alerts. Choose lifetime or monthly access.
A price comparison you can verify
We match offers to the same grading certificate, show where every price came from, and explain what is—and is not—included.
Matched on the certificate
We rank the same IGI, GIA, or GCAL stone across sellers, and flag anything that is only a likely match.
Item price, stated plainly
The number is the listed item price. Tax and shipping vary by seller, and we say so.
Every seller, every search
We check the best online diamond retailers on every search, not a paid or curated few.
Price history
See how a stone's price has moved over time before you commit.
Search free. Unlock the power tools.
Create a free account for unlimited diamond searches. Unlock fit scoring, saved searches, tracking, price history, and alerts for $40 once or $19.99 monthly.
$40 once · or $19.99/month
- CaratRank fit scoring
- Saved searches and a watchlist of stones
- Email alerts when a price drops or a new seller lists your stone
Unlimited searches are included with every free account.