09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco)
09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco) 09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco)

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09166 - Beautiful 4.24 Inch Azurite Cristals + Malachite Cristals - Alnif (South Morocco)

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Species
Azurite crystals + Malachite crystals
Age
-
Location
Alnif, South Morocco
Formation
Azurite mines near Alnif
Size
107.7 mm   •    in
Weight
416 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.

- Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Pseudomorphs after more tabular or blocky azurite crystals also occur. Baryte or barite is a mineral consisting of barium sulfate (BaSO4). Baryte is generally white or colorless, and is the main source of barium. The baryte group consists of baryte, celestine (strontium sulfate), anglesite (lead sulfate), and anhydrite (calcium sulfate). Baryte and celestine form a solid solution (Ba,Sr)SO4.

 

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