This is an authentic TIFFANY 18K Rose Gold Amethyst Octagonal Sparklers Ring size 51 or 5.75. The ring is crafted of 18 karat rose gold and features a faceted purple amethyst stone with bold splash of color, only from Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.