Item #: 1191687 This is an authentic TIFFANY 18K Yellow Gold Citrine Schlumberger Hammered Ring 51 5.75. The ring is crafted of 18 karat yellow gold and features a bezel-set oval cut citrine stone atop a hammered tapered band. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.