mineral

Azurite Geode

Azurite (Cu3(CO3)2(OH)2)

Hardness: 3.5 to 4 on Mohs scale. Color: Deep azure blue. Luster: Vitreous to dull. Crystal Structure: Monoclinic. Specific Gravity: 3.77 to 3.89. Cleavage: Perfect in one direction, though rarely visible in geode form.

Hardness: 3
Color: Deep azure blue
Luster: Vitreous to dull

Identified March 18, 2026More mineral →

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Physical properties

Formation & geological history

Azurite is a secondary mineral formed in the oxidized zones of copper ore deposits. It forms as carbonated water descends through the soil and reacts with subsurface copper ores. Most specimens found today are from the Holocene or Pleistocene epochs, though the primary copper deposits may be millions of years old.

Uses & applications

Primarily used as a collector specimen and ornamental stone. Historically used as a blue pigment for paints. Used in jewelry (though soft and fragile) and as a minor ore of copper.

Geological facts

In ancient Egypt, azurite was considered a sacred stone used by high priests to open the 'third eye.' It is chemically unstable over long geological time periods and will eventually weather into green Malachite as it absorbs water.

Field identification & locations

Identify in the field by its intense 'electric blue' color and its association with green Malachite. It reacts (effervesces) when exposed to dilute hydrochloric acid. Commonly found in Morocco, Namibia, and Arizona, USA.