Swiss Blue Topaz & Diamond Ring in solid 9ct white gold. Size: 9.5 x 6.4 mm (0.37 x 0.25 in). Material: White Gold. Total metal weight: 2.6 gr. Oval cut Swiss blue topaz (8 x 6 mm) = 1.25 ct total. Round brilliant cut diamond (1 x 1 mm, I colour, I1 clarity) = 0.04 ct total. Colour: Blue. Stone cut: Oval Cut. Anniversary: 4th Anniversary. Birthstone: November.