Men's Emerald Octagon Ring in solid sterling silver. Size: 16 mm (0.63 in). Material: Sterling Silver. Total metal weight: 11.3 gr. Radiant cut emerald (11 x 9 mm) = 5.5 ct total. Colour: Green. Stone cut: Radiant Cut. Occasion: Father's Day. Anniversary: 20th Anniversary, 35th Anniversary. Birthstone: May.