London Blue Topaz- 3 Carat Fantastic Gemstone. Gemstone can be replaced with other birthstone, if you would prefer a custom ring, please contact us. ★Description *Center stone: 8mm Round Cut Classical London Blue Topaz. *Accent stone: 0.1Ct Princess Cut CZ or Moissanite(14K gold only) * Material: Sterling Silver with White/Yellow/Rose Gold Plated or Solid 14k Gold( White/Rose/Yellow gold) *Band Width(Bottom): 1.7-1.9mm ★Procedure information Please select the material and ring size from the drop