This is an authentic TIFFANY 18K Yellow Gold Platinum Diamond .80ct Solitaire Engagement Ring size 48 or 4.5. The ring is crafted of 18 karat yellow gold and platinum, and features a single round brilliant diamond weighing approximately .80 carat, with F color and VS clarity. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.