This is an authentic TIFFANY & CO Platinum Diamond Elsa Peretti Curved Band Ring size 51 or 5.75. This elegant ring features a bright platinum curved band with a single brilliant .18 ctw diamond. This timeless piece will bring a special style to any look, from Tiffany & Co! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.