This is an authentic TIFFANY & CO. 18K Yellow Gold Ring Gold 6.25. This bold ring is crafted of 18 karat gold. The ring has a unique and very appealing diamond shaped quilt-like exterior for an unforgettable look from Tiffany & Co. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.