Gemstone profile and identification guide
Azurite
Azurite is a deep blue copper carbonate mineral, often associated with malachite in oxidized copper deposits.
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Overview
Azurite is a deep blue copper carbonate mineral, often associated with malachite in oxidized copper deposits.
Did you know? Azurite historically served as a blue pigment before modern synthetic pigments became dominant.
Use this profile as a collector reference and educational guide for quick on-page comparison, then validate with the interactive identification system.
Identification
Name: Azurite
Scientific classification: Carbonate (Azurite)
Hardness: 3.75 Mohs
Transparency: opaque
Lustre: vitreous
Crystal system: Monoclinic
Primary colour: Blue
Secondary colour: Deep Blue
Colour family: Blues
Distinguished by intense azure colour, copper-mineral association, low hardness, and blue streak.
Verification Status
Status: verified-core-fields
Reference priority: GIA, Gem-A, Mindat, International Gem Society
Core identity, locality, and physical-property fields reviewed against standard gemological references.
Values are given as practical gemological ranges where appropriate.
Physical Properties
Hardness category: medium
Hardness value: 3.75 Mohs
Chemical composition: Copper carbonate hydroxide [Cu3(CO3)2(OH)2]
Crystal system: Monoclinic
Common locations: Democratic Republic of the Congo, Namibia, Morocco, Mexico, Australia
Learn more: Gem-A gemstone education resources.
Colour Variations
Opaque to translucent copper carbonate in deep azure-blue tones.
Optical effects: None specified in the current dataset.
Detailed Gemology
Mineral species: Azurite
Mineral group: Carbonate group
Chemical formula: Copper carbonate hydroxide [Cu3(CO3)2(OH)2]
Mohs hardness: 3.75
Crystal system: Monoclinic
Lustre: vitreous
Transparency: opaque
Streak: Light blue
Cleavage: Good in one direction
Fracture: Conchoidal to uneven
Specific gravity: 3.70-3.90
Refractive index: 1.730-1.838
Optical phenomena: None typically diagnostic
Colour range: Deep azure to dark blue
Common inclusions: Malachite intergrowths, matrix fractures, limonite staining
Geological environment: Oxidized zones of copper deposits
Principal mining regions: Democratic Republic of the Congo, Namibia, Morocco, Mexico, Australia
Important commercial sources: Commercial lapidary azurite comes mainly from African and Moroccan copper districts, with additional material from Mexico and Australia
Historical significance: Long used as a historical pigment and ornamental mineral.
Common treatments: Stabilization and resin impregnation may be used in lapidary material.
Synthetic or imitation forms: Dyed composites and glass imitations exist.
Common look-alikes: Sodalite, lapis lazuli, dyed magnesite
Jewellery uses: Used in cabochons, carvings, and collector specimens rather than high-wear jewellery.
Care recommendations: Soft and brittle; avoid acids, heat, and ultrasonic cleaning.
Cross-check profile data with GIA Gem Encyclopedia and Mindat entry for Azurite.
Formation
Forms as a secondary copper mineral in supergene oxidation zones above copper sulfide deposits.
Origin
Commercial lapidary azurite comes mainly from African and Moroccan copper districts, with additional material from Mexico and Australia
Uses
Best for: Used in cabochons, carvings, and collector specimens rather than high-wear jewellery.
Ideal uses: Collector pieces and protected settings that minimize abrasion risk.
Care
Soft and brittle; avoid acids, heat, and ultrasonic cleaning.
Need another candidate? Use advanced gemstone search or return to the identification guide.
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Azurite FAQ
How can I identify Azurite?
Compare hardness (3.75 Mohs), crystal system (Monoclinic), colour profile, and lustre (vitreous) with your sample. Then cross-check related gemstones listed above.
What colour range does Azurite appear in?
Opaque to translucent copper carbonate in deep azure-blue tones.
Where is Azurite commonly used?
Collector pieces and protected settings that minimize abrasion risk.. For maintenance, follow the care guidance in this profile.
Scientific References
GIA: general gemstone identity (reviewed) - Batch 01 factual verification pass.
Gem-A: gemological terminology and testing references (reviewed) - Batch 01 factual verification pass.
Mindat: mineral species and principal localities (reviewed) - Batch 01 factual verification pass.
International Gem Society: gem trade context and treatment overview (reviewed) - Batch 01 factual verification pass.