Black Opal Cross Pendant Necklace in solid sterling silver. Size: 19.1 x 31.8 mm (0.75 x 1.25 in). Material: Sterling Silver. Total metal weight: 4.92 gr. Oval cut black opal (7 x 5 mm) = 3 ct total. Colour: Black. Stone cut: Oval Cut. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.