This is an authentic TIFFANY 18K Yellow Gold Diamond .25ct Elsa Peretti Diamonds by the Yard Pendant Necklace. This lovely necklace is a collar length 18 karat gold chain with a .25 carat diamond pendant for an unforgettable look only from Tiffany & Co! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.