Tiffany & Co., a gem-set and diamond pendant, designed as a heart-shaped padlock and key

Tiffany & Co., a gem-set and diamond pendant, designed as a heart-shaped padlock and key, the padlock of floral openwork, set with a sequence of circular-cut coloured stones including citrine, tourmaline, amethyst, iolite and fire opal, and brilliant-cut diamonds, the reverse spelling out 'Tiffany', to a white gold chain, pendant length 2.9cm, 44cm, pendant signed T&CO, the chain signed Tiffany & Co