Item #: 155284 This is an authentic TIFFANY & CO Platinum Diamond Princess Cut Engagement Ring 5. This enchanting engagement ring is pure platinum and has a 0.18 ct princess cut diamond with 3mm in width. 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.