What Does 375 Mean on Jewelry?

375 means 9-karat gold — very common in British and European jewelry. On the millesimal scale it's 375 parts pure gold per 1,000, or 37.5% gold. 9K isn't sold as 'gold' in the US (it falls below the 10K minimum), but it's a legal, popular gold standard in the UK.

What is a 375 piece worth?

9K is common in the UK and holds modest melt value — about $36 of gold per gram at a ~$3,000/oz price — with most of the piece being alloy.

How to verify a 375 stamp

Scan the 375 mark with the Hallmark Reader to confirm it's genuine 9K and not a plated imitation. Anyone can stamp a mark on metal, so a hallmark alone isn't proof — the fastest way to check is to photograph the stamp and run it through the free Hallmark Reader, then confirm the metal itself with the Is It Real? tool. For a full picture of what your piece is worth, get a free jewelry appraisal. To compare 375 with every other mark side by side, see the full jewelry stamps and markings chart.

Frequently asked questions