A group of jewellery, including a Tiffany & Co. demi-parure

A group of jewellery, including a Tiffany & Co. demi-parure, comprising: a hematite, cultured pearl, gold and onyx necklace, suspending a heart-shaped gold and onyx pendant, length 41cm, pendant length 4cm, signed KMcD for Kiki McDonaugh, partial British hallmark; a pair of gold, citrine and onyx earrings by Kiki McDonaugh, length 3.1cm each, clip and post fittings, signed KMcD, British hallmarks for 9ct gold; a ruby and diamond turtle brooch, length 4.3cm; an oval citrine and half cultured pearl brooch, length 3.2cm, two cultured pearls deficient; a silver 'X'-shaped demi-parure of brooch and earrings by Paloma Picasso for Tiffany & Co., brooch length 6.2cm, earrings each 3cm, each signed Paloma Picasso and Tiffany & Co., stamped 925 for silver, a gilt metal watch by Chanel, length 18cm, quartz movement; and a bicoloured platinum and gold ring, size L1/2