Malachite

Field of view: 5 mm. A botryoidal group of malachite. The botryoidal green group is malachite. The colorless part with a vitreous luster encrusted with malachite is gangue quartz. The opaque pale brown part at the lower left is the host sandstone.

Recovered from an open space of a quartz vein in a meteoric oxidation zone of a moderately high-temperature hydrothermal deposit associated with welded tuff.

Malachite from this location was described in 1982.