Compare diamonds side by side
Line up two to four diamonds on grade, the 4Cs, proportions, and fair market value — so you can see which is the better buy at a glance, not just which has the bigger spec sheet.
What you can compare
Every diamond is lined up on the things that actually decide value.
Overall grade
An at-a-glance A–D quality verdict for each stone.
The 4Cs
Carat, cut, color, and clarity, lined up column by column.
Proportions
Depth, table, and measurements that drive light performance.
Est. market price
Each diamond's fair market value, benchmarked against Rapaport.
What actually matters when comparing diamonds
A bigger spec isn't always the better diamond. Here's what to weigh.
Cut comes first
Cut has the biggest impact on how a diamond looks. Between two stones, the better-cut one will usually appear brighter and more lively — often worth more than a small bump in color or clarity.
Clarity only needs to be eye-clean
Inclusions you can't see with the naked eye don't change a diamond's beauty. When comparing, an SI1 that's eye-clean can be a far better value than a flawless stone at the same price.
Color is relative to the setting
A near-colorless G–J can look white in yellow- or rose-gold settings. Comparing color in isolation can lead you to overpay for a difference no one will notice on the hand.
Compare price per carat, not just total
Total price hides the real comparison. Price per carat — and how each stone sits against the wholesale benchmark — tells you which diamond is actually the better buy.
How it works
Check your diamonds
Enter a GIA number or upload each certificate. Signed-in checks save to your account automatically.
Pick 2–4 to compare
From your saved diamonds, select the stones you want to line up side by side.
See them side by side
Grade, 4Cs, proportions, and market value in one table — so the better buy is obvious.
Start with one diamond
Check a GIA certificate for free — then add more and compare them side by side.
Check a diamond →