What Does 417 Mean on Jewelry?

417 stamped on jewelry means 10-karat gold. It's the millesimal version of 10K: 417 parts pure gold per 1,000, or 41.7% gold. This is the minimum purity that can be legally called gold in the United States, and its higher alloy content makes it hard and durable but paler in color.

What is a 417 piece worth?

10K is the lowest purity legally sold as 'gold' in the US. It still has melt value — about $40 of gold per gram at a ~$3,000/oz price — but less than 14K or 18K.

How to verify a 417 stamp

Since 10K's lower gold content is sometimes passed off as higher karat, scan the 417 stamp with the Hallmark Reader and cross-check with the Is It Real? tool. 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 417 with every other mark side by side, see the full jewelry stamps and markings chart.

Frequently asked questions