This is an authentic TIFFANY Platinum Diamond Blue Sapphire Ring size 51 or 5.75. This stunning ring is crafted of platinum and features a blue sapphire stone and a round brilliant diamond on each side with a total approximate carat weight of 0.28 carats. Enjoy this ring with the classic style only from Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.