Psilomelane
Psilomelane is a mineral with the chemical formula BaMn8O16(OH)4·3H2O. It has a Mohs hardness of 5-6 and submetallic to dull luster.
Psilomelane properties
| Type | Mineral |
|---|---|
| Chemical formula | BaMn8O16(OH)4·3H2O |
| Mohs hardness | 5-6 |
| Luster | Submetallic to dull |
| Typical colors | Black, dark brown, dark green |
| Formation | Typically forms in manganese-rich deposits, often in sedimentary environments. |
| Rarity | 5 / 10 |
Mohs hardness 5–6 — fairly hard
1 · Talc5 · Apatite10 · Diamond
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