Exact means exact
The same grading lab and normalized report number is an exact certificate match. That is the strongest signal that two listings point to one physical stone.
Private cross-seller comparison
Is it a different deal, or the same stone?
Diamond inventory is syndicated. One certified stone can appear behind more than one storefront and more than one price. Same Stone catches exact report matches and possible measurement matches without building a remote database of your shopping.
No accountNo uploadVault stays in this browser
Capture a candidate
Paste listing text, or use the bookmarklet. The parser looks for shape, carat, measurements, grading lab, report number, and a displayed price.
Candidates0
Sellers0
Exact report matches0
Possible measurement matches0
Largest listed price spread$0
Local candidate vault
Your comparisons
Measurements are a warning
Shape, carat, length, width, and depth can flag a possible match when a report number is missing. It is a prompt to investigate, not proof by itself.
Nothing becomes a lead silently
Seller, URL, price, report number, notes, and captured text stay in your browser. A Stienhardt visit carries only shape, carat, and whether Same Stone found a match.