This is an authentic ROBERTO COIN 18K White Gold Diamond .50ct Cento Solitaire Pendant Necklace. The necklace is crafted of 18 karat white gold and features a single solitaire diamond weighing approximately .50 total carat weight with F color and VS2 clarity. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.