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Atacamite

Formula: Cu2(OH)3Cl
System: Orthorhombic
Colour: Bright green, dark ...
Lustre: Adamantine, Vitreous
Hardness: 3 - 3½


Libethenite

Formula: Cu2(PO4)(OH)
System: Orthorhombic
Colour: Light to dark green, ...
Lustre: Sub-Vitreous, Resinous, Waxy, Greasy
Hardness: 4


Photo by: © Tóth László

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