Item #: 249348 This is an authentic TIFFANY & CO 14K Yellow Gold Onyx Signet Ring. This stylish limited edition ring is 14 karat gold and features an oval black onyx stone, 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.