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Azurite
Azurite
Mineral Properties and Uses
What is Azurite?
Azurite is a deep blue copper carbonate. It serves as a minor ore of copper. It is also a popular gem and ornamental stone because of its blue color. Azurite's low hardness limits its use as a gem and as an ornamental stone. It is often found in association with malachite in the oxidized zone above copper deposits.
Physical Properties of Azurite |
| Uses |
minor ore of copper, gemstone, ornamental stone |
| Color |
azure blue |
| Streak |
light blue |
| Luster |
vitreous |
| Diaphaneity |
transparent to translucent |
| Cleavage |
prismatic, perfect |
| Mohs Hardness |
3.5 - 4 |
| Specific Gravity |
3.8 - 4.0 |
| Distinguishing Characteristics |
vivid blue color, effervescence in HCl |
| Chemical Composition |
copper carbonate - Cu3(CO3)2(OH)2 |
| Crystal System |
monoclinic |
| Azurite and malachite from Morenci, Arizona cut as a freeform cabochon. This gemstone is approximately 27 millimeters by 23 millimeters. |
Contributor: Hobart King
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| Azurite from Tintic, Utah. Specimen is approximately 4 inches (10 centimeters) across. |
| Azurite and malachite from Morenci, Arizona cut as freeform cabochons. Each piece is approximately 13 millimeters by 18 millimeters. |
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