Art Nouveau Wheat Design Cabochon, molded black glass, French. 32x30mm. b5-630

Antique French Art Nouveau molded matte black jet glass cabochon, with a wheat design and a pierced frame.  32x30mm. Back has a protruded round flat, or "button" platform. A very rare piece, in immaculate uncirculated condition. Limited quantity. France, 1900's.