TrekGEO > Mineral Trail > Koshinetsu region > Yamanashi pref. > Malachite

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Myoho Mine

Shimobe, Minobu city, Minami-Koma county, Yamanashi pref., Japan

Source for copper


Field of view: 5 mm. Malachite associated with chalcocite. The dark green crust is malachite. The surrounding pale green globules are brochantite.

Recovered from a meteoric oxidation zone of a sediment-hosted Cu deposit subjected to Prehnite-Pumpellyite facies metamorphism. Formed in less than 50 years after the mine was closed,

Malachite from this location was described in 1940.

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