Cushion Cut Alexandrite Halo Ring in solid sterling silver. Size: 16 x 16 mm (0.63 x 0.63 in). Material: Sterling Silver. Total metal weight: 5.5 gr. Cushion cut alexandrite (11 x 11 mm, grade AAA) = 7.5 ct total. Colour: Colour Changing. Stone cut: Cushion Cut. Occasion: Wedding, Formal Dress, Mother's Day. Anniversary: 55th Anniversary. Birthstone: June.