Quartz
Yanagidaira, Makioka village, Yamanashi city, Yamanashi pref., Japan
This locality is closed to collecting.
Source for silicon
Length: 30 mm. Prismatic crystals of quartz. The rainbow-color of the right quartz crystal is due to a thin film of iron oxide on the surface. Striations are vertical to the prism elongation.
Recovered from a titanium type rare-element pegmatite associated with S-type (Ilmenite-series) granite. Formed in the late Miocene (9 Ma).
Quartz from this location was described in 1894.
Other localities
- Kobushi Mine (Skarn, Japanese twin)
- Sanjyo Mine (Skarn, Japanese twin)
- Akatani Mine (Skarn, Green)
- Hirukawa (Pegmatite, Black)
- Otome Mine (Alpine Fissure)
- Takemori (Alpine Fissure, Phantom/Double pointed/Inclusions)
- Mount Ogawa (Alpine Fissure)
- Takaneyama Mine (Hydrothermal, Radial)
- Arakawa Mine (Hydrothermal)