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Fluorite

Takane Mine

Hirukawa, Nakatsugawa city, Gifu pref., Japan

Fluorite

Field of view: 10 mm. Purple fluorite associated with quartz. The purple grains are fluorite, and the surrounding transparent host is gangue quartz.

Recovered from a quartz vein of a pneumatolytic deposit formed near the boundary between welded tuff and S-type (Ilmenite-series) granite, members of a caldera complex. Formed in the Late Cretaceous (70 Ma).

Fluorite from this location was described in 1938.

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