Black Opal & Diamond Pendant Necklace in solid 9ct white gold. Size: 6.4 x 19.1 mm (0.25 x 0.75 in). Material: White Gold. Total metal weight: 0.7 gr. Pear cut black opal (10 x 7 mm) = 1 ct total. Round brilliant cut diamond (1 x 1 mm, H colour, SI1 clarity) = 0.05 ct total. Colour: Black. Stone cut: Pear Cut. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.