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Erythrite

Erythrite comes from Bou Azzer, Quarzazate, Morocco. They form dark purple, oily shiny, translucent, flat crystals up to 1,1 cm in size, some of which coalesce into rosette-shaped aggregates. There are Co-Ni ore residues in the matrix.

Origin Africa » Morocco » Midelt » Mibladen
Size category Large Cabinet (10-20 cm)
Size 10,7 x 5,8 x 7,7 cm
Weight 358 g
The biggest crystal 1,1 x 0,3 x 0,15 cm

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.

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