Heraeus Quarzglas GmbH & Co. KG manufactures quartz glass for the optical, chemical, semiconductor, photovoltaic, high-tech, specialty fibers, solar, and medical technology industries. Its products include tubes, plates, ingots, rods, flanges, opaque blanks, cylinders, opaque quartz glass, quartz crucibles, quartz components, synthetic fused silica, material grades, fabricated quartz ware, lamp materials and optics. The company was founded on April 3, 1912 and is headquartered in Hanau, Germany.