composition hydrous silica gel

name source from where it is mined, the Peruvian Andes

other accepted names Andean opal, Andean blue opal, Andean blue silica, blue opal
 
color aquamarine to seagreen
color source trace amounts of copper

significant sources San Patricio, Peru

MOH scale 5.5 - 6.5

care and treatment Relatively soft, Peruvian opal should be treated with care as it can be scratched by any harder material. Wash in warm soapy (non-detergent) water.