Co₃(AsO₄)₂.8H₂O

This sample of erythrite is displayed in the Smithsonian Museum of Natural History. Erythrite is an arsenate of cobalt with the composition Co₃(AsO₄)₂.8H₂O. This sample is described as erythrite with roselite. It is about 8x20 cm and is from Bou Azzer, Morroco.

Mindat: Erythrite