Hallmark guide · Gold
10K gold stamp: what it means
10K is 10 parts gold in 24 (417 in decimal). Wikipedia notes it was historically the US minimum for gold; the current FTC Guides (since 2018) allow any accurate karat marking, e.g. '9 Kt. Gold'.
- Metal
- Gold
- Purity
- 417/1000
- Where
- US
01
Often confused with
- Not a UK legal fineness; UK uses 9ct (375) as its lowest.
- '10K GF' is gold filled.
02
What a piece marked 10K / 417 is worth
Melt value $519.29. Likely cash offer $363.50 – $467.36.
41.7% pure gold58.3% silver, copper & zinc
Signed and designer pieces can sell for well above melt as whole jewelry. Check sold listings before you scrap them.
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