The silver we use is 100% guaranteed 925 sterling silver, no substitutes. Each piece is hallmarked 925. Stone Types: Genuine Tanzanite & Cubic Zirconia Total Long: Total Weight: 2.5 grams (including gemstone & silver) Setting Metal: 925 Solid Sterling Silver Style: - Customer Service Is Our #1 Priority! The item "1.3cts Genuine Tanzanite & Cubic Zirconia 925 Silver Earrings Jewelry TZE1012" is in sale since Friday, June 24, 2016. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Earrings\Gemstone".The seller is "xtremegems2010" and is located in CA. This item can be shipped worldwide.