Natural Blue Sapphire and Topaz Ring Sterling Silver925 Adjustable ring.Natural Blue Sapphire and Topaz Ring Sterling Silver925 Adjustable ring. Metal: 925 Sterling Silver Stone : Natural Blue Sapphire 5*4 mm Stone : Natural Topaz 3 mm Ring Size can be adjustable. We use top quality materials. Our metals are water safe After getting your jewelry in contact with the water, please clean it and make sure to D R Y it well afterward and store it in a dry place (avoid humidity). You need to keep your jewelry away from chemical