Peridot & White Topaz Halo Ring in solid 9ct white gold. Material: White Gold. Total metal weight: 2.4 gr. Round cut peridot (6.5 x 6.5 mm) = 1 ct total. Round cut white topaz (1 x 1 mm) = 0.34 ct total. Colour: Green. Stone cut: Round Cut. Occasion: Wedding, Mother's Day. Anniversary: 16th Anniversary. Birthstone: August.