Item #: 750455 This is an authentic TIFFANY Platinum Diamond .90ct Solitaire Engagement Ring 51 5.75. The ring is crafted of platinum and features a near colorless diamond weighing approximately .90 carats, with G color and VS1 clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.