Azurite
Azurite (IMA recognized) · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Monoclinic; typically occurs in massive, earthy, radiating, or botryoidal habits.
Mineral Group
Carbonates (Basic Copper Carbonate)
Chemical Formula
Cu3(CO3)2(OH)2
Formation Process
Secondary mineral formed by the weathering of copper ores in a carbonated environment; often associated with Malachite.
About This Crystal
Deep 'azure' blue, often associated with green malachite or brown iron oxides. This specimen exhibits an earthy/dull luster with a weathered, cracked surface texture.
Physical Characteristics
Color: Azure-blue; Streak: Blue; Cleavage: Fair in two directions; Fracture: Conchoidal/Splintery; Specific Gravity: 3.7-3.9; Tenacity: Brittle; non-fluorescent.
Optical Properties
Biaxial (+); Refractive Index: 1.730-1.838; High birefringence; Strong pleochroism in shades of blue.
Hardness & Durability
Origin Region
Arizona (USA), Morocco, Tsumeb (Namibia), and Lyon (France). Typically found in the oxidized zones of copper ore deposits.
Hardness & Durability
Mohs Hardness: 3.5 to 4. Low durability; very sensitive to scratches, heat, and acidic cleaners.
Care & Maintenance
Clean only with a soft, dry or damp cloth. Avoid ultrasonic cleaners, acids, and prolonged sunlight which can turn the mineral green (converting to malachite).
Rarity & Value
Relatively common but high-quality crystalline specimens are prized by collectors. Value increases with color richness and lack of alteration.
Special Characteristics
Often undergoes pseudomorphism into Malachite. Dissolves in hydrochloric acid with effervescence.
Lore & History
Historically used as a blue pigment since ancient Egypt. Traditionally associated with the Third Eye chakra, intuition, and spiritual insight.