This is an authentic ROBERTO COIN 18K Rose Gold Diamond Large Cento O Cord Necklace. The necklace is crafted of 18 karat rose gold and features a O motif on a black cord chain. The pendant features three rows of diamonds and a center diamond, approximately 2.65 total carat weight. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.