TrekGEO > Mineral Trail > Kanto region > Gunma pref. > Wakabayashilite

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Nishinomaki Mine

Minami-Nomaki, Shimonita city, Kanra county, Gunma pref., Japan

This locality is closed to collecting.


Field of view: 5 mm. Wakabayashilite associated with orpiment and realgar. The sprays of transparent pale yellow needles are wakabayashilite. The red grains are realgar. The dark yellow basement is gangue quartz encrusted with orpiment.

Recovered from an open space of a quartz vein in a low-temperature hydrothermal deposit formed by an andesite dike in andesitic tuff breccia filling a caldera. Formed in the late Miocene (6 Ma).

The first wakabayashilite in the world was described from this location in 1970.

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