This vintage Art Deco sterling marcasite and onyx brooch/pendant features a classic design with a black onyx stone set in sterling silver. The intricate details and unique combination of materials make it a standout piece of fine jewelry for women who appreciate vintage accessories. Measuring 1.75 inches in length, this unsigned brooch captures the essence of the Art Deco era with its elegant and artistic design, making it a versatile and stylish addition to any jewelry collection.