Item #: 397809 This is an authentic TIFFANY Platinum Diamond .40ct Solitaire Engagement Ring 49 5. This exquisite six prong platinum ring features a round brilliant cut diamond approximately weighing .40 carats. This is a classic ring with the one of a kind style only from Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.