Opal and diamond ring Featuring an oval cabochon measuring approximately 21,5 x 12,3 mm as gauged within the mount, within a gold and silver surround, decorated with circular-cut diamonds. The opal has not been tested or certified by a gemological laboratory. Stamped 925 for sterling silver and 750 for 18K gold Finger size : 60 Gross weight approximately : 14,40 grams