Calcite
Hama, Kawazu city, Kamo county, Shizuoka pref., Japan
Source for Quick lime and Sodium cyanide
Field of view: 10 mm. Calcite crystal associated with quartz. The group of translucent white scalenohedral crystals is calcite. The surrounding translucent white host is gangue quartz. The opaque white parts at the bottom are trace of shell sticked to the surface.
Recovered from an open space of a quartz vein of a low-temperature hydrothermal Au-Ag deposit associated with tholeiitic andesite-basalte tuff breccia in an oceanic arc subjected to prophylitization alteration. Formed in the early Pleistoene (4.0 Ma).Calcite from this location was described in 2007.
Other localities
- Chichibu Mine (Hydrothermal Skarn, Scalenohedral)
- Horado Mine (Hydrothermal Skarn, Granular)
- Nakatatsu Mine (Hydrothermal Skarn, Rhombohedral)
- Waga-Sennin Mine (Metasomatic Skarn, Scalenohedral)
- Choshi (Andesite, Granular)
- Kodomari (Hydrothermal, Scalenohedral)
- Shobusawa (Au-Ag vein, Scalenohedral)
- Mount Futago (Limestone, Rhombohedral)
- Koma (Calcareous sandstone, Twin)
- Cotswolds (Oolitic limestone, Granular)
- Iwakake (PrP facies, Scalenohedral)