Gold stamps explained: 999, 916, 875 and 750
Last updated: 17 October 2026
Most gold carries a small stamp with a number. This article explains what the number means and how it relates to karat.
A number out of 1000
The stamp shows fineness: how many parts out of 1000 are pure gold. 999 is almost pure, 916 is 22 karat, 875 is 21 karat and 750 is 18 karat.
| Stamp | Karat | Gold share |
|---|---|---|
| 999 | 24K | 99.9% |
| 916 | 22K | 91.6% |
| 875 | 21K | 87.5% |
| 750 | 18K | 75.0% |
How it relates to karat
Karat is the same idea counted out of 24. Divide the karat by 24 to get the share of gold: 22 divided by 24 is about 91.6%, which is why 22K is stamped 916.
What to check
Look for the stamp on the piece, usually on the clasp or the inside of a ring. Ask for the purity to be written on the invoice, and keep the paperwork. A stamp alone is not a guarantee, so buy from a seller you trust.
Quick answers
What does 916 mean on gold?
916 means 916 parts out of 1000 are pure gold, which is 22 karat, about 91.6% gold.
What karat is 750 gold?
750 is 18 karat, which is 75% pure gold.
What is the difference between 875 and 916?
875 is 21 karat (87.5% gold) and 916 is 22 karat (91.6% gold). 916 has a richer colour and is slightly softer.