This is an authentic ROBERTO COIN 18K Rose Gold Diamond Circle Pendant Necklace. The necklace is crafted of 18 karat rose gold and features an open circle motif stationary pendant pave-set with approximately .25 total carat weight of diamonds, along with a hidden synthetic ruby. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.