This is an authentic ROBERTO COIN 18K Yellow Gold Diamond .23ctw Diamonds By The Inch Station Necklace. The necklace is crafted of 18 karat yellow gold and features five bezel-set round brilliant cut diamond stations weighing approximately .23 total carat weight. The necklace also features a synthetic ruby on the lobster clasp. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.