Peridot & White Topaz Open Halo Ring in solid 9ct white gold. Material: White Gold. Total metal weight: 2.3 gr. Pear cut peridot (9 x 6 mm) = 1.25 ct total. Round cut white topaz (1 x 1 mm) = 0.29 ct total. Colour: Green. Stone cut: Pear Cut. Occasion: Wedding, Mother's Day. Anniversary: 16th Anniversary. Birthstone: August.