Heart Shaped Black Opal & Diamond Pendant Necklace in solid 9ct white gold. Size: 6.4 x 16 mm (0.25 x 0.63 in). Material: White Gold. Total metal weight: 0.7 gr. Heart shaped black opal (6 x 6 mm) = 0.5 ct total. Round brilliant cut diamond (1 x 1 mm, H colour, SI1 clarity) = 0.07 ct total. Colour: Black. Stone cut: Heart Shaped. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.