Azurite
Azurite is a soft blue copper carbonate mineral. The mineral is known for its color - a distinctive royal blue. It is formed by the weathering of and is one of the only two basic copper carbonates. Azurite has the formula Cu3(CO3)2(OH)2, and its copper cations are attached to carbonate and hydroxide anions. Azurite has been prized as a gemstone since Ancient times.
Uses
Azurite has been used for centuries in various applications. These have included the use as an ornamental stone, a source of paint pigment, and collectible mineral.
| Properties | |
|---|---|
| Chemical Formula | Cu3(CO3)2(OH)2 |
| Hardness | 3.5-4 |
| Crystal System | Orthorhombic |
| Mineral Class | Carbonates |
| Luster | Vitreous |