Euchroite is a hydrated
copper arsenate hydroxide mineral with formula: Cu
2AsO
4OH·3H
2O. It is a vitreous green to emerald green mineral crystallizing in the
orthorhombic system. It has a
Mohs hardness of 3.5 - 4.0 and a
specific gravity of 3.39 - 3.45. It was first described in 1823 in
Ľubietová,
Slovakia.
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