TrekGEO > Mineral Trail > Tokai region > Shizuoka pref. > Alunite

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Ugusu Mine

Ugusu, Nishi-Izu city, Kamo county, Shizuoka pref., Japan

Source for Alum and Alumina


Field of view: 20 mm. A group of alunite. The transparent hexagonal tabular crystals are alunite. Both alunite and Natroalunite were reported from this locality.

Recovered from an open space of andesite subjected to alunitization alteration. Formed in the early Pleistocene (1.5 Ma).

Alunite from this location was described in 1935.

Other localities

  • Ugusu Mine (Alunitization, Hexagonal tabular)
  • Funabara mountain pass (Alunitization, Hexagonal tabular)
  • Toya Mine (Kuroko, Hexagonal tabular)
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