This is an authentic TIFFANY & CO 18k Yellow Gold Heart Tag Necklace. This stylish choker is 18 karat gold and features an iconic heart tag engraved with Tiffany & Co. This is a marvelous necklace with a distinctive look from Tiffany & Co. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.