Item #: 553672 This is an authentic TIFFANY Platinum Diamond .18ct Harmony Solitaire Engagement Ring 52 6. This lovely engagement ring is crafted of platinum and has a round brilliant cut solitaire, approximately .18 total carat weight, beautifully set in four prongs. Enjoy this beautiful ring for someone special or simply treat yourself, with the unforgettable style of Tiffany. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.