Henri Picq, an Art Deco emerald, sapphire and diamond brooch, 1920s, naturalistically modelled as a

Henri Picq, an Art Deco emerald, sapphire and diamond brooch, 1920s, naturalistically modelled as a ribbon bow, pavé-set with circular-cut diamonds, accented with lines of buff-topped calibré-cut emeralds and sapphires, mounted in platinum, length 4.9cm, French assay marks for platinum and 18ct gold, partial maker's mark HP with ace of spades for Henri Picq, numbered 88114