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Alunogen

Yoshimi-Hyakuana

Yoshimi city, Hiki county, Saitama pref., Japan

Alunogen

Field of view: 10 mm. A botryoidal group of alunogen. The white botryoidal crust is alunogen. The grayish-green grains on alunogen is fragments of the host tuff.

Recovered from a rhyolitic tuff bed in a dry climate. Formed in less than 6 months.

Alunogen from this location was described in 1993.

Other localities

  • Yoshimi-Hyakuana (Evaporite, Botryoidal)
  • Sagiri Valley (Evaporite, Botryoidal)
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