Item #: 603892 Year: 1990 This is an authentic TIFFANY 18K Yellow Gold Diamond Signature X Ring size 54 6.75. This elegant ring is crafted of 18 karat yellow gold with a central X motif that is accented with diamonds, approximately .35 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.