This is an authentic TIFFANY Platinum Diamond .40ct Solitaire Engagement Ring 51 5.75. The ring is crafted of polished platinum and features a princess cut diamond, approximately .40 carat with F color and VVS2 clarity in a four-prong setting atop a knife-edge band. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.