Art Deco Emerald, Diamond, Platinum Ring The ring features a square-shaped emerald measuring 6.00 x 6.00 x 5.45 mm and weighing approximately 1.15 carats, enhanced by elongated hexagon-shaped diamonds measuring 7.00 x 3.00 x 2.25 mm and weighing a total of approximately 0.65 carat, set in platinum.