Diopside
Horado-Komi, Seki city, Gifu pref., Japan
Length: 10 mm. A pointed long tabular crystal of transparent green diopside.
Recovered from an open space of skarn formed by contact metamorphism of I-type (magnetite-series) granite associated with a caldera complex. Formed in the early Paleocene (65 Ma).
Diopside from this location was described in 1952.
Field of view: 30 mm. Groups of diopside. The transparent pale green prisms with a vitreous luster are diopside. The basement is aggregate of pale yellow grains of grossular and white calcite.
Other localities
- Chichibu Mine (Skarn, White)
- Kasuga Mine (Skarn, White)
- Horado Mine (Skarn, Green)
- Ishibaiyama (Dolomite Skarn, Granular)
- Mount Hiiragi (Dolomite Skarn, Granular)
- Kami-Sano (Basalt, Green)
- Arai (Serpentinite, Prismatic)
- Kamioka Mine (Migmatite, Tabular)