Cushion Cut Tanzanite Pendant Necklace in solid 9ct gold. Size: 6.4 x 12.7 mm (0.25 x 0.5 in). Material: Gold. Total metal weight: 3.08 gr. Cushion cut tanzanite (6 x 6 mm) = 1 ct total. Colour: Blue. Stone cut: Cushion Cut. Occasion: Wedding, Mother's Day. Anniversary: 24th Anniversary. Birthstone: December.