This is an authentic ROBERTO COIN 18K Yellow White Gold Diamond Appassionata Link Pave Necklace. The necklace is crafted of 18 karat yellow and white gold and features textured links and a lobster clasp pave-set with round brilliant cut diamonds, approximately .19 total carat weight. The necklace also features a signature synthetic ruby stone set on one of the links. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.