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0 item @ $0.00  

Pyrolusite

#31636

Pyrolusite

#31636
Availability
Sold
Size
3 x 6 x 3 cm - Sm Cabinet 
Formula
MnO2 (RRUFF)
Locality
Montreal mine, Iron Co., Wisconsin, United States

This piece is composed nearly entirely of black submetallic Pyrolusite with thin blades with deep striations on the front and backsides.

Pyrolusite

Formula
MnO2 
Crystal System
Tetragonal 
Crystal Habit
Reniform, Dendritic, Earthy 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
steel gray, iron gray, bluish gray 
Streak
black 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
6-6.5 

Data courtesy of Webmineral.

Collection
Phillips Collection

Garske label

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