- Jewelry Identifier
- Hallmarks
* Hallmark reference
Every jewelry hallmark, explained
From 18K and PT950 to 925, 585, and gold-filled marks — this is a complete reference to the stamps you'll find inside rings, chains, and clasps. Each one has its own page covering purity, melt value, regional variants, and how to verify it by hand.
Published May 30, 2026
Gold
- 1000 GOLD100.0% gold
- 999.9100.0% gold
- K2499.9% gold
- 99999.9% gold
- 99599.5% gold
- 99099.0% gold
- CHUK_KAM99.0% gold
- K2291.6% gold
- 91691.6% gold
- 87587.5% gold
- K2083.3% gold
- 83383.3% gold
- 80080.0% gold
- K1875.0% gold
- 75075.0% gold
- 750‰75.0% gold
- 750/100075.0% gold
- 62562.5% gold
- K1458.5% gold
- 58558.5% gold
- 58358.3% gold
- 58358.3% gold
- 50050.0% gold
- K1041.7% gold
- 41741.7% gold
- 41641.6% gold
- K937.5% gold
- 37537.5% gold
- 33333.3% gold
- CROWNGold
- AuGold
Platinum
Palladium
Silver
gold-plated
gold-filled
gold-rolled
silver-gilt
titanium
tungsten-carbide
zirconium
ceramic
rhodium-plated
assay-mark
verified
gold-alloy-modifier
silver-plated
base
iridium
rhodium
ruthenium
mixed-metal
niobium
decorative-mineral
organic
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