Find TIFFANY & CO. Return To Double Heart Tag Extra-large 18ct Yellow- And Enamel Pendant Necklace on Editorialist. Tiffany & Co.’s Return to Tiffany collection is inspired by the jeweller's iconic key ring first introduced in '69. Now, for the Double Heart Tag pendant necklace, it’s reinvented, but once again with that telltale tag suspended from a polished 18-carat yellow-gold belcher chain. Rather than trek all the way to New York City and take in the city sights, we suggest you save…