CERULEITE

 

Ceruleite is a hydrous copper aluminum hydroxy-arsenate mineral, Cu2Al7(AsO4)4(OH)1312H2O.  It has a nonmetallic luster, a rich blue color, a pale bluish streak, is moderately hard (H = 5 to 6), and is typically massive, compact, or powdery.  Ceruleite is only known in the oxidized zone of arsenic-bearing metallic mineral deposits.

 

Ceruleite from the Emma Louisa Mine, Guanaco District, Antofagasta Province, Chile (CSM # 52600, Colorado School of Mines Geology Museum, Golden, Colorado, USA).

 


 

Photo gallery of ceruleite

 


 

Home page