This is an authentic ROBERTO COIN 18K Yellow White Gold Diamond By the Inch Seven Station Dog Bone Necklace . The necklace is crafted of 18 karat yellow and white gold, and features a dog bone style chain with seven diamond stations set in white gold bezels weighing approximately .28 total carat weight. Follow this item for alerts. Roberto Coin is a registered trademark of Roberto Coin. FASHIONPHILE is not affiliated with Roberto Coin.