Hello Robin! The purity of silver lands on a numeric scale, or rating system, based on 1,000. Sterling is an alloy with 925 parts silver and 75 parts copper. A stamp, called a quality mark, will tell you how many parts of silver make up the ring. In the U.S., the marking will typically read 925,. 925 or S925! We love silver because it is durable and versatile! Here at JTV we offer a Rhodium Plating which is a noble metal in the Platinum family which coats our Silver which allows for increased toughness and even brighter shine! Please let us know if we can be of any additional assistance, we love to help!

From what I've read on several different sites, 925 means sterling silver.