This is an authentic TIFFANY 18K Yellow Gold Diamond Blue Sapphire Elsa Peretti Color by the Yard 3 Station Necklace. The necklace is crafted of 18 karat yellow gold and features a round brilliant cut blue sapphire pendant and round brilliant cut diamonds of approximately .20 total carat weight on the chain. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.