Galena, chalcopyrite, pyrite and quartz

An excellent cabinet size specimen of galena, overgrowth by chalcopyrite tetrahedral crystals. The chalcopyrite is internally dissolved and replaced particularly by pyrite – small pyrite crystals cut the surface of the mother chalcopyrite crystals. The second generation of a galena-bearing solution formed a large galena crystal, which covered most of the chalcopyrite crystals, but some of the ends of these crystals stay out. At the end of the crystalization process, the white quartz overgrowth all of the early formed crystals.