Manganese bronze is bright gold in color and can be cast centrifugally into refractory molds. Composition includes 58.25% copper and various amounts of zinc, iron, manganese, aluminum and tin...
Pyrolusite ore. A glaze colorant typically giving browns, blacks and, at high concentrations, metallics. Manganese dioxide decomposes to MnO at 200? C, picks up O2 to become the dioxide and above...