Cushion Cut Alexandrite & Diamond Ring in solid 9ct white gold. Size: 22.4 x 16 mm (0.88 x 0.63 in). Material: White Gold. Total metal weight: 3.49 gr. Cushion cut alexandrite (9 x 9 mm, grade AAA) = 4 ct total. Round brilliant cut diamond (1 x 1 mm, H colour, SI1 clarity) = 0.08 ct total. Colour: Colour Changing. Stone cut: Cushion Cut. Occasion: Wedding, Mother's Day. Anniversary: 55th Anniversary. Birthstone: June.