Tanzanite & CZ Halo Ring in solid sterling silver. Size: 12.7 x 6.4 mm (0.5 x 0.25 in). Material: Sterling Silver. Total metal weight: 2.7 gr. Round cut tanzanite (5 x 5 mm) = 0.5 ct total. Round cut cubic zirconia (1 x 1 mm) = 0.3 ct total. Colour: Blue. Stone cut: Round Cut. Occasion: Engagement, Wedding, Mother's Day. Anniversary: 24th Anniversary. Birthstone: December.