Copper Carbonate Hydroxide, Cu3(CO3)2-(OH)2
Crystal System: Monoclinic
- Azurite occurs as a secondary mineral in the oxidized zones of copper deposits. It is
associated with malachite, chrysocolla, cuprite, native copper, chalcocite, calcite, and
limonite. Azurite forms at a lower temperature than malachite, which it commonly
replaces as a pseudomorph. Pseudomorphs of azurite after other minerals are also common.
Azurite also occurs in sandstones where carbolic waters mixed with waters rich in copper
Azurite occurs as elongated or tabular prismatic crystals exhibiting various shades of
transparent to translucent azure blue with a vitreous luster. Crystals are often
intergrown or grouped in radiating aggregates and also occur as granular or
concretionary masses. Azurite often forms sharp crystals in contrast to malachite.
Rocks from Ron Zeilstra's Collection
Index of Specimen Images
Table of Contents