TrekGEO > Mineral Trail > Koshinetsu region > Nagano pref. > Quartz

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Mount Ogawa

Kawahage, Kawakami city, Saku county, Nagano pref., Japan

This locality is closed to collecting.

Source for silicon


Length: 30 mm. Prismatic crystals of quartz. Quartz crystals are observed in the open spaces of quartz veins cutting granite.

Observed in the open space of quartz veins associated with S-type (Ilmenite-series) biotite monzogranite. Formed in Miocene or Pliocene.

Quartz from this location was described in 2006.

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