Cushion Cut Swiss Blue Topaz & White Topaz Pendant Necklace in solid 9ct white gold. Size: 16 x 16 mm (0.63 x 0.63 in). Material: White Gold. Total metal weight: 1.3 gr. Cushion cut Swiss blue topaz (9 x 9 mm) = 3.5 ct total. Round cut white topaz (1 x 1 mm) = 0.12 ct total. Colour: Blue. Stone cut: Cushion Cut. Occasion: Wedding, Mother's Day. Anniversary: 4th Anniversary. Birthstone: November.