Stibnite
Minami-Nomaki, Shimonita city, Kanra county, Gunma pref., Japan
This locality is closed to collecting.
Field of view: 10 mm. Stibnite associated with realgar. The radial group of silver-white prisms is stibnite. The massive red parts are realgar. The grayish-white host is gangue quartz.
Recovered from a quartz vein in a low-temperature hydrothermal deposit formed by an andesite dike in andesitic tuff breccia filling a caldera. Formed in the late Miocene (6 Ma).
Stibnite from this location was described in 1929.
Other localities
- Akadani Mine (Hydrothermal, Prismatic)
- Nishinomaki Mine (Hydrothermal, Radial)
- Awashiro Mine (Sericitization, Prismatic)