Pair of 18ct gold, platinum and diamond 'Signature X' earrings, Jean Schlumberger for Tiffany & Co., circa 1990, each 9.50 mm half hoop composed of six rope work strands applied to the centre with an X-shaped motif pave-set with brilliant-cut diamonds together weighing approximately 0.50 carat, length approximately 20 mm, signed Tiffany & Co., Schlumberger, 1990, post and clip fittings.