Read the stamp
916 hallmark
In a 916 hallmark, the fractional karat calculation is about 91.67%; the stamp states fineness in thousandths. 925 is instead a familiar silver standard.
916, 22K and neighbouring stamps
916 and 22K identify the high-gold 22-karat grade. The fractional karat calculation is about 91.67%; the stamp states fineness in thousandths. 925 is instead a familiar silver standard. Common combinations include 22K 916 and 916 ITALY. Look inside a ring shank or on a chain clasp or end tag.
What to check next
Keep suffixes attached to the number: 22K GF describes a gold-filled layer and 22K GP a plated layer. A plain 916 fineness mark describes the gold alloy. On a chain, inspect the links as well as the clasp because a replacement clasp can carry its own stamp.
