Copper

Shimobe, Minobu city, Minami-Koma county, Yamanashi pref., Japan

Field of view: 10 mm. Copper associated with hematite. The fine copper-red grains with a metallic luster at the left half are copper. The red part at the right end of the photograph is the hematite-rich host. The host turns grayish-green around copper-rich beds. This grayish-green color is probably attributed to Fe₂₊ formed by reduction of Fe₃₊ of hematite.

Recovered from a mudstone-hosted Cu-Mn deposit subjected Zeolite facies metamorphism.

Copper from this location was described in 1982.

Other localities

List of Japanese copper localities

Shiromaru Mine (Bedded Mn, Celsian)
Kusama Mine (Bedded Mn, Hematite)
Nakayashiki (Hyaloclastite, Calcite)
Nagatoro (Greenschist facies)