Cushion Cut Tanzanite & Diamond Contemporary Pendant Necklace in solid 9ct gold. Size: 6.4 x 12.7 mm (0.25 x 0.5 in). Material: Gold. Total metal weight: 0.35 gr. 1 cushion cut tanzanite (8 x 6 mm) = 1.5 ct. 4 round brilliant cut diamonds (1 x 1 mm, F colour, VS1 clarity) = 0.02 ct total. Colour: Blue. Stone cut: Cushion Cut. Anniversary: 24th Anniversary. Birthstone: December.