Pyrolusite 4.3~5, psilomelane 3.7~4.7, ferruginous manganese 4.72~4.83, ferromanganese 4.7~4.9
The specific gravity (density) of manganese ore varies due to its mineral type and chemical composition. The following is the specific gravity range and characteristics of the main manganese minerals:
Pyrolusite (MnO₂)
Specific gravity is 4.3~5 g/cm³, manganese content is as high as 63.2%, in the form of columnar or powdery aggregates, color ranges from light gray to black, dirty hands and brittle texture.
Ppsilomelane (hydrous manganese oxide)
Specific gravity is 3.7~4.7 g/cm³, manganese content is 45~60%, often in block or stalactite, smooth surface, semi-metallic luster.
Brownite (Mn₂O₃)
Specific gravity is 4.72~4.83 g/cm³, manganese content is 69.9%, crystals are conical or dense blocks, color is brown-black to steel gray.
Hodmanganese ore (Mn₃O₄)
Specific gravity is 4.7~4.9 g/cm³, manganese content is 65~72%, it is the most manganese-rich mineral in nature, usually in granular or block aggregates.
