JOSEPH CHAUMET - 1920S BURMESE SAPPHIRE AND DIAMONDS BARRETTE BROOCH Set with an oval cabochon sapphire set with four brilliant-cut diamonds (old cut). Mounted in 18K yellow gold and platinum. French work, hallmarked Chaumet. Gross weight: 10.32 g. Length: 5.8 cm. Weight of the sapphire: approximately 16 carats. Total weight of the diamonds: approximately 3.80 to 4 carats. Preliminary opinion of GEM Paris: origin Burma, unheated. Case in the J. Chaumet style. A sapphire, diamond, platinum and 18K yellow gold bar brooch by Joseph Chaumet, circa 1920. French assay mark and Chaumet maker's mark. Gross weight : 10,32 gr. Length : 5,8 cm. Sapphire weight : 16 carats approx. Total diamond weight : 3,80 to 4 carats approx. GEM Paris preliminary report, in his opinion : origin Burma, non heated. J. Chaumet shaped box.