Pyrolusite

What is Pyrolusite?

Pyrolusite definition and meaning on Dictionary terms:
noun
a common mineral, manganese dioxide, MnO2, the principal ore of manganese, used in various manufactures, as a decolorizer of brown or green tints in glass, and as a depolarizer in dry-cell batteries.

 

reference: https://www.dictionary.com/browse/pyrolusite

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