This is an authentic ROBERTO COIN 18K White Gold Diamond Diamante Necklace. The necklace is crafted of 18 karat white gold and features a rhombus motif with a dangling center, set with approximately .27 total carat weight, 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.