Copper Carbonate Mineral
Azurite – Crystal Wiki
Deep blue and expressive – an iconic collector's mineral
Azurite (Cu3(CO3)2(OH)2)
Properties & Characteristics
Scientific Data
- Chemical Formula
- Cu3(CO3)2(OH)2
- Crystal System
- Monoclinic
- Mohs Hardness
- 3.5–4
- Density
- 3.7–3.9 g/cm3
Physical Properties
- Color
- Deep blue to azure blue
- Luster
- Vitreous to adamantine
- Transparency
- Translucent to opaque
- Special Feature
- Can transform into malachite over time
What is Azurite?
Azurite is a secondary copper mineral with intense blue color and high display appeal.
Formation
It forms in oxidized copper deposits and is often associated with malachite.
Localities & Market
Important sources include Morocco, Namibia, Mexico, and the USA.
Quality Characteristics
Color intensity, crystal habit, preservation, and matrix aesthetics determine its quality.
Care & Handling
Clean gently and dry, protect from moisture and impact.
Frequently Asked Questions
Why does azurite often occur with malachite?
Both minerals form in similar copper weathering environments.
Is azurite color-stable?
Under unfavorable conditions, a long-term transformation towards malachite can occur.
Is azurite suitable for ring jewelry?
Not really; it is better suited as a collector's stone.