TrekGEO > Mineral Trail > Koshinetsu region > Yamanashi pref. > Anatase

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Hirasawa Mine

Enzan-Hirasawa, Koshu city, Yamanashi pref., Japan

This locality is closed to collecting.

Source for Titanium


Field of view: 3 mm. Anatase perched on adularia. The quadrangular pyramidal black crystal is anatase. There are many steps on the surface by the rough striations vertical to the crystal elongation. The white host is adularia. The platy silver crystals with perfect cleavage are muscovite.

Recovered from a titanium type rare-element pegmatite in a S-type (Ilmenite-series) margin of I-type (Magnetite-series) granite formed by the reduction reaction of granite magma with pelitic rocks. Formed in the late Miocene (10 Ma),

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