What does 225 stamped sterling mean?

"225 stamped sterling" typically indicates that the piece of silver jewelry or item is made of sterling silver that has been alloyed with additional metals, often resulting in a silver content of 92.5% (the standard for sterling silver) plus an additional 22.5% of other metals. The "225" might also refer to a specific manufacturer's mark or a design style. Always check for authenticity and quality markings, as variations can exist.