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Minerals - Pyrolusite | TerraCollect
Mineral - Pyrolusite
Pyrolusite
MnOâ‚‚
Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
none
Formula
MnOâ‚‚
Unit Cell
Physical Properties
Hardness
6 - 6.5
Streak
black
Density
Optical Properties
Color
black
gray
Birefringence
Luster
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
tetragonal
Point Group
Cleavage
Fracture
Tenacity
Space Group
Habit
dendritic,
acicular,
radial,
grape-shaped
Formation
hydrothermal, Oxidationszone von Mangan-Lagerstätten
Paragenesis
Twinning
Rarity
Very common
Synonyms
Pyrolusite
