Item #: 257500 This is an authentic TIFFANY & CO. Platinum .33 Carat Diamond Engagement Ring 49.3 5. This enchanting engagement ring is pure platinum and has a six pronged Tiffany setting for a round brilliant cut diamond .33ctw. Enjoy this special ring for someone special with the unforgettable style of Tiffany & Co. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.