This is an authentic TIFFANY 18K Yellow Gold 1837 Interlocking Circles Pendant Necklace. This beautiful necklace is crafted of 18 karat yellow gold with two interlocking circle pendants. This truly is an unforgettable piece, only from Tiffany! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.