TrekGEO > Mineral Trail > Kanto region > Chiba pref. > Laumontite

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Heguri-naka, Minami-Boso city, Chiba pref., Japan


Field of view: 10 mm. Laumontite associated with thomsonite-Ca. The bladed opaque white crystal at the center is laumontite. The translucent parts are thomsonite-Ca. The grayish-brown host at the bottom is tuff.

Recovered from an open space of a thomsonite-Ca vein in tuff of an accretionary complex subjected to Prehnite-Pumpellyite facies metamorphism.

Laumontite from this location was described in 1982.

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