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Diopside

Kami-Sano

Nambu city, Minami-Koma county, Yamanashi pref., Japan

The outcrop is a natural monument of Yamanashi prefecture.

Diopside

Height of the crystal: 20 mm. Dispatched crystals of diopside phenocrysts.

The front small face: b(010)

The perpendicular faces at the right and the left: a(100)

The pinacoidal faces at the right and the left: m(110)

The pinacoidal faces at the top and the bottom: s(021)

Recovered from a basalt dike intruded in granite porphyry. Formed in the early Pliocene (4 Ma).

Diposide from this location was described as augite in 1926.

Diopside

Height of the crystal: 20 mm. Dispatched twins. A pair of single crystals contact forming sparrow-tail twins.

The front small face: b(010)

The perpendicular faces at the right and the left: a(100)

The pinacoidal faces at the right and the left: m(110)

The pinacoidal faces at the top and the bottom: s(021)

Diopside

Field of view: 50 mm. Phenocrysts of diopside. The transparent green grains are diopside. The green color is due to Cr-ion. The yellow grain at the center top is pyrite. The host is basalt of a dike.

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)
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