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Mineralpedia Details for Psilomelane

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Psilomelane

Psilomelane

Formula
(Ba,H2O)2Mn5O10 
Crystal System
Monoclinic 
Crystal Habit
Botryoidal, Reniform, Mammillary 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
iron black, dark steel gray 
Streak
brownish black 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
5-6 
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