Amethyst & White Topaz Halo Stud Earrings in solid 9ct white gold. Size: 6.4 x 6.4 mm (0.25 x 0.25 in). Material: White Gold. Total metal weight: 2.0 gr. Round cut amethyst (5 x 5 mm) = 1 ct total for pair. Round cut white topaz (1 x 1 mm) = 0.4 ct total for pair. Colour: Purple. Stone cut: Round Cut. Occasion: Wedding, Mother's Day. Anniversary: 6th Anniversary. Birthstone: February.