TrekGEO > Mineral Trail > Kanto region > Tochigi pref. > Rhodonite

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Kanoiri Mine

Kusagyu, Kanuma city, Tochigi pref., Japan

Source for manganese


Field of view: 50 mm. Massive rhodonite. The massive pink parts are rhodonite. There are large cleavage surfaces. Black parts are manganese dioxide formed by weathering oxidation.

Recovered from a chert-hosted bedded manganese deposit subjected to Albite-Epidote-hornfels facies contact metamorphism.

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