This is an authentic ROBERTO COIN 18K White Gold Diamond .10ct Diamonds by the Inch Pendant Necklace. The necklace is crafted of 18 karat white gold and features a single bezel-set round brilliant cut diamond, weighing approximately .10 carat. The necklace also features a signature synthetic ruby stone station near a lobster clasp. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.