This is an authentic TIFFANY Platinum Diamond .43 Lucida Engagement Ring 52 6. The ring is crafted of platinum and features a solitaire patented "Lucida" cut diamond weighing approximately .43 carat, with E-F color and VVS-VS clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.