Tiffany & Co. diamond and multi-gemstone 'Heart Key' pendant necklace, of bombe form, the openwork heart shaped padlock is pave-set to the front with brilliant-cut diamonds between collet-set circular-cut gemstones including citrine, tsavorite, amethyst, fire opal, yellow opal, iolite and pink tourmaline supported by a key charm pave-set to the front with diamonds, the reverse featuring an openwork foliate pattern with 'Tiffany' logotype, supported from a trace chain, the diamonds together weighing 2.76 carats, mounted in 18ct pink gold, pendant length 38 mm, pendant width 30 mm, inner circumference 460 mm, signed T&Co. For Tiffany & Co., accompanied by a facsimile Tiffany & Co. Retail replacement valuation, numbered 104631PN, dated 28 May 2013.