This is an authentic TIFFANY Platinum Diamond .31ct Solitaire Engagement Ring size 51 or 5.75. This exquisite platinum ring features a sparkling round brilliant cut diamond approximately .31ct total carat weight, E in color, and VVS1 in clarity Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.