Azurite

Azurite is a mineral belonging to the carbonate group. Its chemical formula is Cu₃(CO₃)₂(OH)₂, making it a basic copper carbonate. Azurite forms in the oxidation zones of copper deposits through the alteration of primary copper-bearing minerals.

Browse below the azurite specimens currently available.

Azurite crystallizes in the monoclinic crystal system. Crystals are typically prismatic or tabular, sometimes grouped in compact clusters. Among the specimens offered, well-defined individual crystals are common, occasionally arranged in fan-like or radiating groups, as well as surfaces covered with fine microcrystals.

Color and Identification

Azurite is immediately recognizable by its deep blue color, caused by the presence of copper in its structure. Shades may range from intense dark blue to lighter tones depending on crystal thickness and growth conditions.

Its luster is generally vitreous. Crystals may appear translucent when thin, or more opaque when massive.

Azurite is frequently associated with malachite, another copper carbonate mineral of green color. Several specimens display both minerals together, creating a natural blue–green contrast.

Locality

The specimens presented here mainly originate from Kerrouchen, Morocco, a locality known for secondary copper mineralization. The available pieces illustrate various crystal habits as well as azurite–malachite associations.

Kerrouchen (Morocco) is generally described in mineralogical inventories and field reports as a site of workings related to oxidized copper mineralization. Visible excavations indicate small-scale, primarily artisanal extraction. Activity is described as focused on specimen production—particularly azurite and malachite—rather than large-scale industrial mining. Available sources suggest that activity may be intermittent depending on the period.

Physical Properties

• Hardness: 3.5 to 4 on the Mohs scale (a relatively soft mineral).

• Density: approximately 3.7 to 3.9.

• Cleavage: azurite can separate cleanly along internal planes, meaning it may split into relatively flat surfaces when subjected to impact.

Azurite may slowly alter to malachite under prolonged humid conditions.

Collecting Interest

Azurite remains consistently sought after by collectors due to:

• the intensity of its blue coloration,

• the quality of visible crystal development,

• its natural association with malachite,

• the range of crystal forms observed within a single locality.