07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco)
07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco) 07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco) 07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco) 07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco)

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07806 - Beautiful Deep Blue Azurite Crystals on Carbonate Matrix - Kerrouchen (Morocco)

$114.50

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Species
Azurite crystals on Carbonate matrix
Age
-
Location
Midelt Province, Morocco
Formation
High Atlas Mountains, Kerrouchen Mine
Size
55.3 mm   •    in
Weight
57 g   •    oz
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Description

Azurite is one of the two basic copper carbonate minerals, the other being bright green malachite. Simple copper carbonate (CuCO3) is not known to exist in nature. Azurite has the formula Cu3(CO3)2(OH)2, with the copper cations linked to two different anions, carbonate and hydroxide. Small crystals of azurite can be produced by rapidly stirring a few drops of copper sulfate solution into a saturated solution of sodium carbonate and allowing the solution to stand overnight.

Azurite crystals are monoclinic. Large crystals are dark blue, often prismatic. Azurite specimens can be massive to nodular. They are often stalactitic in form. Specimens tend to lighten in color over time due to weathering of the specimen surface into malachite. Azurite is soft, with a Mohs hardness of only 3.5 to 4.

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