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Erythrite

Erythrite is an aqueous cobalt arsenate, Co3 (AsO4) 2.8H2O. It was once called the "cobalt flower." It was named in 1832 by F. S. Beudant after the Greek erythros = red. It forms prismatic to acicular crystals and stalked aggregates. However, it mostly occurs in the form of earthy masses and powdery aggregates. It is usually dark purple to light pink. It is a secondary mineral that is formed in the oxidation zones of cobalt veins, such as skutterudite. More info

Erythrite is an aqueous cobalt arsenate, Co3 (AsO4) 2.8H2O. It was once called the "cobalt flower." It was named in 1832 by F. S. Beudant after the Greek erythros = red. It forms prismatic to acicular crystals and stalked aggregates. However, it mostly occurs in the form of earthy masses and powdery aggregates. It is usually dark purple to light pink. It is a secondary mineral that is formed in the oxidation zones of cobalt veins, such as skutterudite.
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