2.74 Carat Genuine Amethyst, Tanzanite & White Topaz .925 Sterling Silver Ring Amethyst Sterling Silver Ring 100% Genuine Gemstones .925 Sterling Silver February Birthstone Amethyst Oval (Not-Treated) - 1.12 Ctw, Tanzanite Round (Heat-treated) - 1.32 Ctw, White-Topaz Round (Heat treated) - 0.30 Ctw