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Goethite

Nakatatsu Mine

Kami-Ono, Ono city, Fukui pref., Japan

Goethite

Field of view: 30 mm. A group of goethite. The reniform black group is goethite. The brown basement encrusted with goethite is aggregate of limonite and quartz.

Recovered from a meteoric oxidation zone of a moderate-temperature hydrothermal deposit combined with skarn formed by contact metamorphism of I-type (magnetite-series) quartz porphyry.

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