This is an authentic ROBERTO COIN 18K White Gold Diamond By the Inch Seven Station Dog Bone Necklace. The necklace is crafted of 18k white gold, and features a dog bone style chain with seven diamond stations, approximately .28 total carat weight. The necklace also features the signature synthetic ruby set on the chain tag and a 18 karat yellow gold jump ring at the end of the chain. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.