Swiss Blue Topaz & CZ Halo Drop Earrings in solid sterling silver. Size: 12.7 x 25.4 mm (0.5 x 1 in). Material: Sterling Silver. Total metal weight: 6.15 gr. Oval cut Swiss blue topaz (8 x 6 mm) = 3 ct total for pair. Round cut cubic zirconia (1 x 1 mm) = 1.25 ct total for pair. Colour: Blue. Stone cut: Oval Cut. Occasion: Engagement, Wedding, Mother's Day. Anniversary: 4th Anniversary. Birthstone: November.