This is an authentic ROBERTO COIN 18K White Gold Diamond Large Cento O Pendant Necklace. The necklace is crafted of 18 karat white gold and features a O motif on a beaded chain. The pendant features three rows of diamonds and a center diamond weighing approximately 2.05 total carat weight. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.