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Okorogawa Mine

Naka-Okorogara, Nikko city, Tochigi pref., Japan

Source for "azurite blue", silicon copper


Field of view: 5 mm. Azurite associated with malachite. The granular blue crystals are azurite. The green crusts are aggregates of acicular malachite crystals. The light brown basement is limonite.

Recovered from a meteoric oxidation zone of a moderately high-temperature hydrothermal deposit associated with welded tuff. Formed in less than 50 years after the mine was closed,

Azurite from this location was described in 1982.

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