Alexandrite & CZ Octagon Pendant Necklace in solid sterling silver. Size: 9.7 x 25.4 mm (0.38 x 1 in). Material: Sterling Silver. Total metal weight: 6.92 gr. Rectangular cut alexandrite (15 x 8 mm, grade AAA) = 7.5 ct total. Colour: Colour Changing. Stone cut: Rectangular Cut. Occasion: Engagement, Wedding, Mother's Day. Anniversary: 55th Anniversary. Birthstone: June.