Malachite
Araya, Aga city, Higashi-Kambara county, Niigata pref., Japan
Source for copper
Field of view: 5 mm. A botryoidal group of malachite. The green globules are radial groups of acicular malachite. The pale brown basement is gangue quartz encrusted with limonite.
Recovered from an open space of a quartz vein in a meteoric oxidation zone of a moderate-temperature hydrothermal deposit associated with rhyolite.
Malachite from this location was described in 1947.
Field of view: 5 mm. Acicular malachite. The radial groups of acicular green crystals are malachite. The rounded dark brown rhombohedrons are siderite. The pale brown basement is gangue quartz encrusted with limonite.
Other localities
- Kisan-mori Mine (Hydrothermal, Radial)
- Mikawa Mine (Hydrothermal, Botryoidal)
- Okorogawa Mine (Hydrothermal, Crust)
- Takatori Mine (Pneumatolytic, Fibrous)
- Kamioka Mine (Pneumatolytic Skarn, Crust)
- Myoho Mine (Sediment-hosted Cu, Crust)
- Kusama Mine (Bedded Mn, Reniform)