The small numbers stamped inside a ring or near a clasp tell you what the metal is and how pure it is. Find your stamp below for what it means and what that metal is worth today.
| Stamp | Means | Melt per gram |
|---|---|---|
925 | Sterling silver | $1.91 |
999 | 24K gold or fine silver | $137.63 |
800 | 800 silver | $1.65 |
375 | 9K gold | $51.66 |
417 | 10K gold | $57.45 |
585 | 14K gold | $80.59 |
750 | 18K gold | $103.33 |
916 | 22K gold | $126.20 |
950 | Platinum 950 | $54.31 |
900 | Platinum 900 or coin silver | $51.45 |
GP GF HGE | Plated or filled, not solid | Very little |
Melt values as of 2026-09-28, from spot prices of gold $4,285.06, silver $64.30 and platinum $1,778.00 per troy ounce.
Gold is marked in karats (10K, 14K, 18K) or in parts per thousand (417, 585, 750). Silver and platinum use parts per thousand: 925 is 92.5% silver, PT950 is 95% platinum. Letters such as GP or GF mean the piece is plated or filled rather than solid.
Can't find a stamp? Resized rings can lose theirs, and older or handmade pieces may never have had one. See how to tell if gold is real.
The stamp tells you the metal. GemstoneAI reads the rest from a photo, including the stones, and estimates what the piece is worth. Your first scan is free.
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