An Art Nouveau gold, ivory, opal and enamel brooch by Marcel Bing, designed as an ivory women’s face in profile, her long hair in billowing waves of gold, her headdress set with two cabochon opals, decorated with green iridescent enamel and dark red enamel highlights.
Maker’s mark of Marcel Bing.
Paris, circa 1900. 

Marcel Bing (1875-1920) was the fourth child of Siegfried Bing (1838-1905), the great collector of Japanese art and founder of the gallery 'La Maison Art Nouveau Bing', located at 22 rue de Provence in Paris. Marcel trained as a jeweler, creating jewelry and vase mounts for the gallery and took over its management upon his father's death in 1905. The shop and its owners were so influential in their day that it was from the name of this Parisian Shop 'La Maison Art Nouveau Bing' that the entire "Art Nouveau" movement got its name. The importance of Bing in the development of the Art Nouveau movement cannot be over-stated .