Suna platinum black opal and diamond brooch. The floral, cluster style brooch features 1 oval, black opal, that measures 14.4x17.8mm. 72 round diamonds surround the center stone. They weigh approximately 4.00 carats total. The brooch measures 1 ½ x 1 ¾ inches, and weighs 11 dwts. It is stamped Suna 900PT 7370 4.