Guilleminite, Malachite, Goethite, Digenite

Superb, well-crystallized, very rich specimen of bright canary-yellow guilleminite with green malachite and dark brown goethite on dark digenite-impregnated, altered, siliceous dolostone matrix, from the famous Musonoi mine in the DR Congo. Eric Quinter specimen U/Th 0190, pictured on mindat.org.