7dhuu ((GALENA, CHALCOPYRITE)), Mississippi Valley District, Wisconsin, 12 x 10 x 8 cm, Cabinet | |
Cubo octahedral crystals of Galena coated with a druze of Chalcopyrite. The matrix is not Galena and the over all weight is not a heavy as you expect with Galena. So the Galena are only on the surface. ex University of Utah Geology Department |