Genuine Corundum Ruby, Amethyst & Moonstone Sterling Silver Ring Size 6. BRAND NEW IN BOX. Lovely three-gemstone ring handmade in India for YS Gems featuring faceted corundum ruby and amethyst stones and a smooth moonstone cabochon bezel-set in sterling silver with a three-shank band. Weighs 4.6 grams. Size 6. Includes ring box. Retail $108.