TrekGEO > Mineral Trail > Koshinetsu region > Nagano pref. > Grossular

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Kobushi Mine

Azusayama, Kawakami city, Minami-Saku county, Nagano pref., Japan


Field of view: 50 mm. Grossular associated with hastingsite. The dodecahedral brown crystals are grossular. The dark green needles overlying grossular are hastingsite.

Recovered from an open space of skarn formed by contact metamorphism of S-type (Ilmenite-series) diorite. Formed in the late Miocene (11 Ma).

Grossular from this location was described in 1947 as garnet and in 1952 as grossular.

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