Item #: 1161506 This is an authentic TIFFANY Platinum Diamond .18ct Harmony Solitaire Engagement Ring 52 or 6. The ring is crafted of platinum and features a round brilliant cut diamond center stone weighing approximately .18 total carat weight, with I color and VS1 clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.