This is an authentic TIFFANY 18K White Gold Diamond 1837 Bar Pendant Necklace The necklace is crafted of 18 karat white gold and features a bar pendant engraved with the 1837 logo and set with a single bezel set round brilliant cut diamond, approximately .16 total carat weight. Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.