Azurite
Azurite is a copper-bearing mineral characterized by its vibrant blue color, which has been used as a pigment and for ornamental purposes since ancient times. It has the property of altering into green malachite due to moisture in the air.
Vibrant blue Azurite
Basic Information
| Chemical Formula | Cu3(CO3)2(OH)2 |
|---|---|
| Classification | Monoclinic system |
| Hardness | 3.5–4 (Mohs scale) |
| Specific Gravity | 3.7–3.9 |
| Transparency | Translucent to opaque |
Characteristics
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Vibrant Blue: Colored by copper components, making it visually striking.
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Mineral Pigment: Used as a pigment since ancient times and appears in medieval paintings.
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Alteration: The property of changing into malachite.
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Brittleness: Low hardness; handle with care as it is prone to wear and scratching.
Varieties and Features
- Combination Azurite-Malachite: A mixture of the two minerals.
- Property Crystalline Azurite: Displays a beautiful crystal structure.
- Habit Spherical Azurite: Found as spherical aggregates.
Cu₃(CO₃)₂(OH)₂
Cu₂CO₃(OH)₂
Azurite (blue) → Malachite (green)
Related Stones & Uses
Related Stones
Malachite Lapis Lazuli Turquoise
History and Uses
- Pigment: Used in medieval European paintings.
- Display Stone: Popular in mineral collections.
- Research: Subject of studies on the alteration of copper minerals.
Care Instructions: As it is sensitive to moisture and impact, it is recommended to store it in a dry place wrapped in a soft cloth.