Psilomelane

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Description

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).

Other Properties

Fracture = subconchoidal. Luster = submetallic. Streak = black

Composition BaMnMn8O1 6(OH)4
Mohs Hardness 5.0 - 6.0

Additional Information

Mineralogy Database: Psilomelane