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Pyrolusite

Tabi

Tabi, Numazu city, Shizuoka pref., Japan

Source for manganese

Pyrolusite

Field of view: 5 mm. Earthy pyrolusite. The earthy light gray parts with a metallic luster are pyrolusite. The brown parts are the host tuff.

Recovered from a Fe-Mn deposit by low-temperature hydrothermal activity associated with andesitic pyroclastic rocks.

Pyrolusite from this location was described in 1970.

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