bling aijewelry stamps · gold
solid metal333 stamp on gold: what it means.
333 means 8k gold: 33.3% pure gold. it's a low-karat standard used mainly in germany and parts of central and eastern europe.
- metal
- 8K gold
- 33.3% gold
- also stamped as
- 333 · 8K · 8KT
- solid or plated
- solid all the way through
what it's worth today
live spot price · updated Sep 24, 2026, 2:59 AM UTC
melt value of the metal only, from the live spot price. buyers pay less than melt; stones, craftsmanship and maker add value.
the mark
what 333 means.
333 is 333 parts gold per 1,000, or 8 karats out of 24. with two-thirds alloy, it's hard-wearing and inexpensive, and it's often paler or more coppery than higher karats.
it's found mostly on german and central european jewelry. the UK won't hallmark it as gold, because its lowest gold standard is 375, and it's rare in the united states.
before you trust it
how to check a 333 stamp.
- hold a strong magnet to it. gold isn't magnetic, so a piece that pulls toward the magnet isn't solid gold. a steel spring inside a clasp can still be magnetic on a genuine piece, so test the body, not the clasp.
- check the edges, the inside of the band and the back of the clasp, where pieces wear first. if a different color shows through, silver, copper or gray, it's plated, whatever the stamp says.
- for certainty, ask a jeweler or gold buyer for an XRF scan. it reads the metal's composition in seconds without scratching the piece, unlike an acid test.
questions
the 333 stamp, answered.
other stamps
every mark is searchable in the hallmark decoder. selling vintage or estate pieces? see photography for vintage and estate sellers.
selling what you found?
photograph it like it's worth something.
bling ai turns a phone photo of a piece into a listing shot that looks like a campaign, so good jewelry sells for what it is.
