This is an authentic TIFFANY Platinum Diamond .31ct Solitaire Engagement Ring size 48 or 4.5. The ring is crafted of platinum and features a prong-set single round brilliant cut diamond, approximately .31 carat, with F color and VS1 clarity grade. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.