This iridescent Ocean Blue Opalite Dolphin Tail .925 Silver Necklace refracts light wonderfully. Held up to light it looks absolutely stunning. This beautiful Ocean Blue opalite Dolphin Tale pendant shares the characteristics of real opal — without the cost of real opal. The 1/2″ Ocean Blue Dolphin Tail pendant comes on a .925 Silver 16″-18″ long necklace with a lobster claw clasp.