TrekGEO > Mineral Trail > Koshinetsu region > Yamanashi pref. > Stilbite

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Akiyama, Uenohara city, Yamanashi pref., Japan


Field of view: 20 mm. A group of stilbite. The transparent prisms with a vitreous luster are stilbite. The opaque grayish-white part at the right is the host andesitic tuff.

Recovered from an open space of a stilbite vein in andesitic tuff subjected to Zeolite facies contact metamorphism. Formed in the late Miocene (7 Ma).

Stilbite from this location was described in 2008.

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