TrekGEO > Mineral Trail > Kanto region > Ibaraki pref. > Beryl

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Mount Myoken

Kozuma village, Hitachi-Ota city, Ibaraki pref., Japan

This locality is closed to collecting.

Source for Beryllium


Field of view: 30 mm. A single crystal of Cs-bearing beryl. The pale green prism on the front of the specimen is beryl. The white host at the upper right is albite.

Recovered from a spodumene subtype rare-element pegmatite in S-type (Ilmenite-series) granite. Formed in the Late Cretaceous (100 Ma).

Beryl from this location was described in 1973.

Other localities

  • Yamano-o (NYF Pegmatite, Aquamarine)
  • Hirukawa (NYF Pegmatite, Prismatic)
  • Yukiiri (NYF Pegmatite, Prismatic)
  • Mount Myoken (LCT Pegmatite, Prismatic)
  • Mount Gyojya (Pneumatolytic, Prismatic)
  • Fukuoka Mine (Pneumatolytic, Prismatic)
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