What Does 999 Mean on Gold?
Stamps describe metal content; they are not a buy/sell quote. When in doubt, test with a jeweler or assay service.
99.9% pure gold — the highest standard
This stamp corresponds to 24K — about 100.0% gold content by weight.
Common in: Global, Asia, Investment bars. Typical items: Gold bars, Bullion coins, Investment pieces.
This fineness shows up often in pieces sold for or imported from Global, Asia, Investment bars—always match the stamp to what you actually weigh.
Illustrative: at the USD spot used on this site, 10 g of 24K gold has a rough melt around $1,495.20 (not an offer).
Gold calculator
Same USD spot basis as the estimates on this page. Adjust weight, unit, or karat to explore scenarios.
Gold Value Calculator
Adjust this price to project a future value. 24K per troy oz.
999 gold — melt by weight (USD, reference)
Same spot basis as the calculator above. Full metal value only—not stones or labor.
Where you'll see the 999 stamp
Check inside ring shanks, near necklace and bracelet clasps, on earring posts or backs, and on small tags. Stamps can be tiny—use bright light or a loupe if the punch is worn.
How to verify a stamp
Stamps can wear down or be wrong. A jeweler can do an acid scratch test or XRF; a magnet won't stick to solid gold, but it isn't proof of purity on its own. For high-value pieces, use a buyer you trust or an independent assay.
FAQ
- What does 999 mean on gold?
- 999 is a fineness stamp. For gold jewelry it means 24K (100.0% gold content in the alloy). 99.9% pure gold — the highest standard
- Is 999 the same as 24K?
- Yes—999 on gold corresponds to 24K purity. Regional stamping styles differ, but the gold fraction is the same idea.