A black metallic hydroxide of barium and manganese. Psilomelane is an important ore of manganese. It occurs as black rounded masses and is found in Germany, France, Belgium, Scotland, Sweden, India, and the U.S.(Arizona, Virginia).
Fracture = subconchoidal. Luster = submetallic. Streak = black
|Mohs Hardness||5.0 - 6.0|
Mineralogy Database: Psilomelane