Crysocolla

Its color comes from the oxidation process of copper ore, which takes on a cyan color with prolonged exposure to oxygen, but the stone also contains various amounts of other minerals, which create its soft texture and porous appearance.
Chemical composition: (Cu,Al)2H2Si2O5(OH)4·n(H2O)
Hardness: 3-4
Density: 2,65 g/cm³
Family:
Origin: Italy, Usa (Arizona), Cile, Congo

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