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Pyrolusite

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CLB531406

Pyrolusite

ex collection Alex Franz, previous collection K.+ J. Frost
Classic Locality

Description Tabs

Description
Locality: 
Långban, Filipstad, Värmland County, Sweden
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5 × 3.8 cm
Description

Massive crystal cluster of shiny black pyrolusite, previously mislabeled 'braunite'. I had it analyzed.

Mineral Data
What's on the rock

Pyrolusite

Formula: 
MnO2
Strunz: 
4.DB.05
Hardness: 
2.0 - 6.5

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