God for us to design products, we are the porters of nature!
| Pyrolusite | |
Chemical Formula |
MnO2 |
Species |
Oxides & Hydroxides |
Crystal System |
Tetragonal |
Mohs Scale |
2-6 |
Specific Gravity |
4.4-5.06 |
Color |
Darkish, black to lighter grey, somethimes bluish |
Streak |
Black to bluish-black |
Luster |
Metallic, Dull, Earthy |
Refractive Index |
Opaque |
Diaphaneity |
Opaque |
Cleavage |
PerfectPerfect on . |
Fracture |
Irregular/Uneven |
| Crystal Habit：Granular to massive: botryoidal and dendritic. Crystals rare | |
| Geological Setting：A common Mn mineral, although difficult to distinguish from similar Mn minerals, pyrolusite forms under oxidizing conditions and high pH. Mainly a mineral of lacustrine, shallow marine, and bog deposits, it is also found in the oxidized zones of manganiferous ore deposits and as deposits formed by circulating meteoric water. Both colloidal processes and bacterial action are important in its formation. | |
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