This is an authentic ROBERTO COIN 18K White Gold Diamond .70ctw Diamonds By The Inch Fifteen Station Necklace. The necklace is crafted of 18 karat white gold and features 15 bezel-set round brilliant cut diamond stations, approximately .70 total carat weight. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.