A French Art Nouveau habillé portrait brooch, repoussé depicting a side profile of a lady, with gemstones incorporated in the portrait, signed Diolot, fitted with tube hinged pin stem and C-catch, French horsehead hallmark (used to indicate '18ct' during 1838 - 1919), measures 3.2 x 2.2 cm, total weight of item 3.3 grams.