Item #: 1601020 Tiffany 18K White Gold Diamond T True Narrow Band Ring 54 7. The ring is crafted of 18 karat white gold and features a T motif band set with round brilliant cut diamonds, approximately .23 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.