Cushion Cut Tanzanite & CZ Drop Earrings in solid sterling silver. Size: 9.1 x 25.4 mm (0.36 x 1 in). Material: Sterling Silver. Total metal weight: 4.0 gr. Cushion cut tanzanite (9 x 7 mm) = 4.5 ct total for pair. Round brilliant cut cubic zirconia (1 x 1 mm) = 1 ct total for pair. Colour: Blue. Stone cut: Cushion Cut. Occasion: Wedding, Mother's Day, Graduation. Anniversary: 24th Anniversary. Birthstone: December.