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

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Nasu-Shiobara city, Tochigi pref., Japan


Diameter: 5 mm. Foitite-Magnesiofoitite associated with pyrophyllite. The gray globules are radial groups of foitite-magnesiofoitite fibers. The center of a globule is foitite, and the slightly darker margin of a globule is magnesiofoitite. The massive white host is aggregate of fine pyrophyllite crystals.

Recovered from a pyrophyllite deposit formed by hydrothermal alteration of rhyolite.

Magnesiofoitite from this location was described in 1982 as dravite and in 1995 as magnesiofoitite.

Other localities

  • Momura (Pyrophyllite, Globular)
  • Kyonosawa (Pyrophyllite, Fibrous)
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