Item #: 904154 This is an authentic TIFFANY 18K Rose Gold Diamond Wide Atlas Open Ring size 51 or 5.75. The ring is crafted of 18 karat rose gold and features a laser cut Roman numeral band with diamond details along the edges of half the band, approximately .45 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.