Azurite

Cu3(CO3)2(OH)2

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Prized since antiquity for its intense azure color, azurite is a monoclinic copper carbonate (Cu3(CO3)2(OH)2) that served for centuries as a blue pigment. It occurs in the oxidized zones of copper ore bodies, frequently alongside malachite, into which it may alter pseudomorphically over time. The mineral is transparent with a vitreous luster, a light-blue streak, and perfect {011} cleavage, building prismatic, tabular, or massive aggregates. Hardness falls between 3.5 and 4, and specific gravity between 3.77 and 3.89. Deep-blue crystals from Morocco and Namibia rank among the specimens most sought by collectors, and the mineral's darker tone distinguishes it from paler blue copper species.

Azurite is an intense blue copper carbonate mineral, historically important as a blue pigment. It commonly occurs with malachite and may pseudomorphously replace to malachite. Fine azurite crystals from Morocco and Namibia are highly sought by collectors.

Système Cristallin Monoclinic
Classe Minérale 05 Carbonates and Nitrates
Dureté Mohs 3.5-4.0
Densité 3.77-3.89
Couleur Azure blue, dark blue
Éclat Vitreous
Trait Light blue
Clivage Perfect {011}, fair {100}
Cassure Conchoidal
Transparence Transparent
Habitus Cristallin Prismatic, tabular, massive

Dureté Mohs

Mohs Hardness: 3,5 – 4,0
1 Soft10 Hard
Azurite has a Mohs hardness of 3.5–4 on the 1–10 mineral hardness scale.
Dureté Mohs Reference Mineral
1 Talc
2 Gypsum
3 Calcite
4 Fluorite
5 Apatite
6 Orthoclase
7 Quartz
8 Topaz
9 Corundum
10 Diamond

Système Cristallin

Monoclinic
Azurite crystallizes in the Monoclinic crystal system.
Propriété Value
Système Cristallin Monoclinic
Axial Relationships a ≠ b ≠ c, α = γ = 90°, β ≠ 90°

Frequently Asked Questions

What is the hardness of Azurite?
Azurite has a Mohs hardness of 3.5-4.0.
What crystal system does Azurite belong to?
Azurite crystallizes in the Monoclinic crystal system.
What color is Azurite?
Azurite is typically Azure blue, dark blue.
What type of luster does Azurite have?
Azurite exhibits a Vitreous luster.
What is the chemical formula of Azurite?
The chemical formula of Azurite is Cu3(CO3)2(OH)2.