Natural Emerald Cut 4 Carat Blue Sapphire Sterling Silver 925 Handmade Women Ring Product: Ring Gemstone: Sapphire Color: Blue Metal Types: Sterling Silver 925, 14k Gold, and 18k Gold Gold Weight: 12 to 14 grams approx Handmade Ring Gemstone Origin: Africa It is Natural, Heated, and Treated Sapphire with a pure Sterling Silver 925, 14k Gold, and 18k Gold Handmade Ring.