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Which one of the following is a manganese containing minerals

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Which one of the following is a manganese containing minerals

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Correct Answer: Option C
Pyrolusite is a manganese-containing mineral. It is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. It is a black, amorphous appearing mineral, often with a granular, fibrous or columnar structure, sometimes forming Reni form crusts.
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