Mineral description : Psilomelane

Psilomelane as small nedles in manganite from Bölet.

Mineral class	Oxides : Pyrolusite - Manganite group
Chemical formula	(Ba,Mn)3(O,OH)6
Crystal system
Habitus	Botryidal aggregates or earthy masses. It also forms as dendrites.
Cleavage
Hardness	6 (or lower on earthy variants)
Density
Color	Black to dark gray.
Streak	Brownish black.
Luster	Submetallic to dull.
Description
Occurance	Often as weathering products from other manganeese minerals.
Associates
Notes
Locations	Not so common in Sweden. Skidberget and Nålberget, Leksand area, Dalarna. As earthy crusts and aggregates in brecciated quartzite. Stollgruvan, V. Silvberg, Dalarna. As dendrites.

To oxides index.

Mineral group index.

Main index.

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