Compare what the eye sees
Two stones can share a carat weight and face up at different sizes. Facet makes the millimeter estimate visible so weight does not masquerade as size.
A diamond listing decoder
Carat is weight.
What you see is millimeters.
Turn a listing's carat weight into its approximate face-up size, then leave with a clean brief you can use to compare stones across sellers.
No accountNo listing URL collectedNo report number collected
Decode the listing
Enter the shape and carat weight shown on the listing.
9.2 x 6.3 mmTypical face-up size for 1.50 ct
Approximate, based on typical proportions and cube-root scaling from vetted one-carat anchors. Always use the exact measurements on the stone's grading report.
Make a shareable Stone CardPaste listing text privately
Use Facet while you shop: drag this button to your bookmarks bar, then click it on a diamond listing. The scan runs in your browser and sends Facet only the shape and carat it finds.
Facet this listing Read a grading report Compare report dimensions Detect duplicate listings Browse 84 open size diagrams Download the open size dataset Get the browser extension Print the true-size comparison sheet Download the diamond shortlist workbook
Facet this listing Read a grading report Compare report dimensions Detect duplicate listings Browse 84 open size diagrams Download the open size dataset Get the browser extension Print the true-size comparison sheet Download the diamond shortlist workbook
Carry one clean brief
Copy the shape, weight, estimated dimensions, and verification checks into a note. Use the same brief when you compare listings or ask a jeweler a question.
Keep the seller out of the check
Verify the report number on the grading lab's own site. Then match the girdle inscription and exact measurements to the stone itself.
Put it inside a useful article
Publishers can use the one-tag web component, sandboxed iframe, or scriptless Link Mint. Each placement gets a distinct public attribution slug.
Put the stone on your own hand.
Stone on Hand calibrates a private hand photo with a credit card's known 85.60 mm long edge, then places the selected diamond's approximate true-size footprint on the ring finger.