Amazing Fire in This Natural Ethiopian Opal, See Video! Big, 9.5x11mm 2.7 Carat Opal, 925 Sterling Silver Artistic Ring, Size 6. Velvet Ring Box Included. Great Gift! Natural Fire Opal Ring, Beautiful Fire, See Video Big 9.5x11mm, 2.75 Ct Ethiopian Opal, 925 Sterling Silver Artistic Size 6