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Psilomelane

#AH56037
SOLD
Psilomelane from near Guernsey, Wyoming, United States - AH56037
Psilomelane from near Guernsey, Wyoming, United States - AH56037

Psilomelane

#AH56037
Availability
Sold
Size
7 x 7 x 3.5 cm - Sm Cabinet 
Formula
MnOx (RRUFF)
Locality
near Guernsey, Wyoming, United States

Manganese oxide arborescent growth in Quartz.

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 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
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