Azurite

Field of view: 5 mm. Azurite in an open space of a quartz vein. The groups of blue grains are azurite. The surrounding white basement is gangue quartz.

Recovered from an open space of a quartz vein in a meteoric oxidation zone of a moderate-temperature hydrothermal deposit associated with rhyolite. Formed in less than 50 years after the mine was closed,

Azurite from this location was described in 1947.

Field of view: 10 mm. Azurite associated with malachite. The tabular blue crystals are azurite. The green crusts associated with azurite crystals are malachite. The dark brown basement is gangue quartz encrusted with limonite.