TrekGEO > Mineral Trail > Kanto region > Saitama pref. > Grossular

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Chichibu Mine

Otaki, Chichibu city, Saitama pref., Japan


Field of view: 50 mm. Grossular associated with calcite. The dodecahedral grayish-green crystals are grossular, and the surrounding white matrix is calcite.

Recovered from skarn formed by contact metamorphism of I-type (Magnetite-series) quartz diorite. Formed in the late Miocene (6 Ma).

Grossular from this location was described in 1918 as garnet and in 1930 as grossular.

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