Mining and supply of black manganese in Brazil  is more and more popular.Many investors want to invest the Mining  of black manganese in Brazil.

Hausmannite tetragonal system, the crystal was a square bipyramid, usually as granular aggregates. The color is black, streak brownish orange or reddish brown. The semi-metallic luster. Hardness 5.5, specific gravity 4.84. Hausmannite is formed by the role of endogenous or metamorphism found in some contact metasomatic deposits, hydrothermal deposits and metamorphosed sedimentary manganese deposit in symbiosis with the brown manganese, etc., is also one of the mineral raw materials, refining manganese.

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