Ultimate Large Round Beautiful Opal 14K Gold Custom Designed Ring. The the round shaped cabochon opal measures 19.33 x 19.21 x19.90 mm. It is set in a gorgeous custom designed 14K gold ring size 7-1/2. This is the most beautiful opal ring I have seen in my more than 50 years in the jewelry and antique business. It is in excellent condition guaranteed to please and delight the new owner. See the video to experience the colors of this gorgeous unique opal ring.