gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1974.039.308.08 Short Communications Guanine and Uricite, Two New Organic Minerals from Peru and Western Australia Bridge P. J. Government Chemical Laboratoires Perth, Western Australia 12 1974 39 308 889 890 22 2 1974 Copyright © 1974, The Mineralogical Society 1974