Chrysocolla

Field of view: 30 mm. Massive chrysocolla in crystalline limestone. The massive pale blue part is chrysocolla. The surrounding brown parts are limestone contaminated with limonite. The rusty yellow grains at the upper left is chalcopyrite, the source of Cu in chrysocolla.

Recovered from a meteoric oxidation zone of a moderately low-temperature hydrothermal deposit combined with skarn formed by contact metamorphism of I-type (magnetite-series) quartz diorite.

Chrysocolla from this location was described in 1929.