Item #: 1691417 This is an authentic TIFFANY Platinum Diamond .18ct Solitaire Engagement Ring 52 6. The ring is crafted of platinum and features a single round brilliant cut diamond, approximately .18 carat, with G color and a VS1 clarity grade, in the signature Tiffany setting. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.