TrekGEO > Mineral Trail > Chugoku region > Yamaguchi pref. > Hedenbergite

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Naganobori Mine

Naganobori, Mito village, Mine city, Yamaguchi pref., Japan


Field of view: 50 mm. Hedenbergite associated with quartz. The dark green prisms are hedenbergite. The massive white parts are quartz. The massive dark green parts at the top and at the bottom are aggregate of fine hedenbergite crystals.

Recovered from a pneumatolytic deposit combined with skarn formed by contact metamorphism of S-type (ilmenite-series) granite. Formed in the Late Cretaceous (85 Ma).

Hedenbergite from this location was described in 1904.

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