This is an authentic TIFFANY & CO 18K Yellow Gold Amethyst Paloma Picasso Sugar Stacks Pendant Necklace. This stylish 18 karat gold necklace is below the collar in length. The necklace features a single amethyst pendant that is perfect for an unforgettable look, from Tiffany & Co! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.