What Does 958 Mean on Jewelry?

A 958 stamp means Britannia silver — 95.8% pure, a British standard higher than sterling (92.5%). It's softer than sterling because of the lower copper content, and it was historically required in England before sterling became standard again. It's solid, high-purity silver.

What is a 958 piece worth?

Britannia silver is purer than sterling and carries slightly higher silver value, prized for fine British work.

How to verify a 958 stamp

Confirm the 958 mark with the Hallmark Reader. 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 958 with every other mark side by side, see the full jewelry stamps and markings chart.

Frequently asked questions