Opal, Diamond, 18k White Gold, Sterling Silver Necklace. Featuring one pear-shaped opal cabochon measuring approximately 18 x 11 mm, accented by forty-nine round-cut diamonds weighing a total of approximately 0.97 cttw., set in an 18k white gold drop style mounting, suspended by a 15 inch sterling silver chain. {Gross Weight: 3.6 dwts}