This is an authentic TIFFANY & CO 18K Yellow Gold Diamond House and Key Charm. This limited edition pendant is 18 karat yellow gold and features a delightful house charm with a diamond window insert and a key. Pair this with a gold chain for an unforgettable look only from Tiffany & Co! Follow this item for alerts. Tiffany is a registered trademark of Tiffany. FASHIONPHILE is not affiliated with Tiffany.