Erythrite

Field of view: 5 mm. An erythrite crust. The pink crust is erythrite. The white parts of the basement is calcite, and the massive dark brown parts are aggregate of grossular crystals. The fine black grains with a metallic luster in the erythrite crust might be cobaltite.

Recovered from a meteoric oxidation zone of a moderate-temperature hydrothermal deposit combined with skarn formed by contact metamorphism of I-type (magnetite-series) granite associated with a caldera complex. Formed in less than 50 years after the mine was closed.

Erythrite from this location was described in 1947.