Reference

Jewelry hallmarks, explained

Nearly every real piece carries a stamp. Here is what each one means, what metal it is, and — the part that matters — whether it is worth anything by weight.

Look up a stamp

Every mark at a glance

MarkMetalMeansWorth as metal
375Gold9K · 37.5% goldYes — solid
417Gold10K · 41.7% goldYes — solid
585Gold14K · 58.5% goldYes — solid
750Gold18K · 75% goldYes — solid
875Gold21K · 87.5% goldYes — solid
916Gold22K · 91.6% goldYes — solid
999Gold or fine silver24K · 99.9% pureYes — solid
925SilverSterling · 92.5% silverYes — solid
958SilverBritannia · 95.8% silverYes — solid
900SilverCoin · 90% silverYes — solid
800Silver800 · 80% silverYes — solid
835Silver830–835 · 83–83.5% silverYes — solid
PT950Platinum95% platinumYes — solid
PT900Platinum85–90% platinumYes — solid
PD950Palladium50–95% palladiumYes — solid
GPBase metalPlated — microns of goldNo
GEPBase metalElectroplatedNo
GFBase metal + bonded goldGold filled — typically 5% gold by weightVery little
VERMEILSterling silver + goldSterling base, gold layerVery little
EPNSBase metalNo silver contentNo
KPGoldKarat plumb — exactYes — solid
CZ—Simulant stoneNo
MOISSANITE—Simulant stoneNo
LG—Lab-grown diamondDiamond, not metal
STAINLESSBase metalNon-preciousNo
BISGold (India)BIS certifiedYes — solid
LIONUK assay marksBritish hallmarking systemYes — solid

All 27 pages

What does 375 mean?What does 417 mean?What does 585 mean?What does 750 mean?What does 800 mean?What does 835 mean?What does 875 mean?What does 900 mean?What does 916 mean?What does 925 mean?What does 958 mean?What does 999 mean?What does BIS mean?What does CZ mean?What does EPNS mean?What does GEP mean?What does GF mean?What does GP mean?What does KP mean?What does LG mean?What does LION mean?What does MOISSANITE mean?What does PD950 mean?What does PT900 mean?What does PT950 mean?What does STAINLESS mean?What does VERMEIL mean?

Work out your own

These pages are worked examples. Put your own details in and get a figure matched to your piece.

Look up a stamp