Erythrite

Yatsuhashi, Shitara city, Kita-Shitara county, Aichi pref., Japan.

This locality is strictly closed to collecting.

Field of view: 5 mm. Erythrite perched on a manganese dioxide crust on the surface of the coarse rhodonite-quartz aggregate. The pink stalactic group is erythrite. The black basement is a crust of manganese dioxide, probably cryptomelane. There are cobaltite grains in quartz of this specimen. Erythrite was formed by weathering of cobaltite.

Recovered from a meteoric oxidation zone of a bedded manganese deposit in pelitic schist subjected to Amphibolite facies regional metamorphism and contact metamorphism by granodiorite. Formed in less than 50 years after the mine was closed,

Other localities

List of Japanese erythrite localities

Naganobori Mine (Pneumatolytic Skarn, Long Platy)
Horado Mine (Hydrothermal Skarn, Crust)
Taguchi Mine (Bedded Mn, AM facies)