Beautiful natural tanzanite gemstones are set in a heavy band of sterling silver with platinum overlay. Additionally, there is 14k yellow gold weaved around the cluster of gems. This is a very heavy ring that will last a lifetime. Stamped STS 925. Size 8! **The last picture is for comparison between the retail price and the prices of my jewelry. STS Jewels Inc. is a preferred jewelry vendor to some of the biggest retailers in USA and has been doing so for 20+ years now. Our customers range from the biggest brick and mortar retailers to one of the best E-tailers in the industry. Not to forget some of the most reputed catalog companies. Jewelry from QVC, HSN, JTV, Gemporia, Kay Jewelers,Shop HQ.