This is an authentic TIFFANY Platinum Diamond .31ct Etoile Solitaire Engagement Ring size 50 or 5.25. This ring is crafted of platinum featuring a half bezel set round brilliant cut diamond weighing approximately .31 carats, with I color and VS1 clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.