bling aijewelry stamps · gold
solid metal585 stamp on gold: what it means.
585 means 14k gold: 58.5% pure gold, alloyed with other metals for strength and color. it's the same standard as a 14K stamp, written the european way.
- metal
- 14K gold
- 58.5% gold
- also stamped as
- 585 · 14K · 14KT · 14 karat · 583 (older pieces)
- solid or plated
- solid all the way through
what it's worth today
live spot price · updated Sep 23, 2026, 9:27 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 585 means.
585 is millesimal fineness: 585 parts gold in every 1,000. 14 karats out of 24 works out to 58.3%, and the stamp rounds that up to 58.5%.
american makers usually stamp 14K and european makers 585, but they're the same metal and worth the same per gram. the remaining 41.5% is alloy, and it sets the color: 14k yellow, white and rose gold all contain the same amount of gold.
some older pieces, particularly from the former soviet union, are stamped 583 instead. that's 14 parts in 24 rounded down, a hair under 585.
before you trust it
how to check a 585 stamp.
- read the whole stamp. letters after the number change everything: 14K GF, 14K GP, 18K HGE and 1/20 12K RGP all describe plated or filled pieces, not solid gold.
- 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.
- look for a maker's mark next to the stamp. in the united states, anyone who stamps a gold or silver quality mark on a piece made since 1962 must stamp a registered trademark beside it, so a lone number with no maker's mark proves very little.
- 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 585 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.
