This is an authentic TIFFANY 18K Yellow Gold Platinum Diamond .53ct Solitaire Engagement Ring 46 3.75. The ring is crafted of 18 karat yellow gold and platinum, and features a single round brilliant diamond weighing approximately .53 total carat weight with F color and VVS1 clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.