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Chalcanthite is a hydrated blue crystalline form of copper sulfate, commonly found in the late-stage oxidation zones of copper deposits. Due to its ready solubility, chalcanthite is more frequently found in greater abundance in arid regions. While chalcanthite does occur in nature, and is usually as a blue massive or crusty material. Well-formed crystals of more than a few millimeters are exceptionally rare. It is, however, quite easy to grow chalcanthite specimens in a laboratory.
Chemistry:
CuSO4 5H2O - Hydrated Copper Sulfate
Class:
Sulfates
Group:
Chalcanthite
Crystal:
Triclinic
Color:
Deep blue
Streak:
White
Luster:
Vitreous to resinous
Diaphaneity:
Transparent to translucent
Density:
2.3
Hardness:
2.5
Cleavage:
Imperfect
Fracture:
Conchoidal
Morphology:
Short prismatic to tabluar crystals, stalactites, films.
Luminescence:
Non-fluorescent
Frequency:
Uncommon
Origin:
Secondary, as a product of the oxidation of copper sulfides, stable only in arid climate.
Occurence:
Bisbee, Arizona USA; Chuquicamata, Chile; Rio Tinto, Spain. Laboratory grown commonly in Brazil, China, & Poland.
Application:
Rarely mined as copper ore. Mineral specimens.
Mineral Gallery
Metaphysical Properties

 
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