CARTIER: A MULTI-GEM AND DIAMOND-SET GIARDINETTO BROOCH Designed as a flowering plant, the onyx and brilliant-cut diamond-set pot, issuing carved chrysoprase and carnelian leaves, accented by cabochon sapphires and brilliant-cut diamonds, mounted in 18K gold, signed Cartier, numbered, with maker's mark 'Sté BA' for Beauce Atelier, French assay marks, length 4.3cm