A mother of pearl and diamond pendant necklace by van Cleef and Arpels, from the 'Cosmos' collection, of floral design, the mother of pearl petals centred with a round brilliant cut diamond, on an integral trace chain, signed and numbered B4304D198, in 18ct gold, French hallmarks. Condition: the necklace presents in excellent overall condition, with very little evidence of wear. Diameter of flower 20 mm.