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Okorogawa Mine

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


Field of view: 5 mm. Gypsum associated with limonite. The white prism is gypsum. The massive brown host is limonite. The green parts are malachite, and the pale blue parts are Cupro-allophane.

Recovered from a meteoric oxidation zone of a moderately high-temperature hydrothermal deposit associated with welded tuff.

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