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Cummingtonite

Adachi

Motoisago, Kawasaki city, Shibata county, Miyagi pref., Japan

Cummingtonite

Field of view: 30 mm. Cummingtonite associated with quartz. The tabular dark brown crystals are cummingtonite. The translucent colorless parts around cummingtonite are granular quartz.

Recovered from an accidental lithic fragment subjected to hornblende-hornfels facies contact metamorphism. Formed in the Late Pleistoene (70 ka).

Cummingtonite from this location was described in 1985.

Other localities

  • Adachi (Sanidinite facies, Granular)
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