Black Opal Cabochon Pendant Necklace in solid sterling silver. Size: 9.7 x 16 mm (0.38 x 0.63 in). Material: Sterling Silver. Total metal weight: 4.32 gr. Round cut black opal (8 x 8 mm) = 1.75 ct total. Colour: Black. Stone cut: Round Cut. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.