An exceptional, aesthetic, cabinet size specimen of pyrite coated by bornite and covellite and showing incredible color play.
An outstanding and extremely rare specimen of pseudomorph of pyrite after sphalerite and chalcopyrite, on quartz.. Giudurska mine, Erma reka, Zlatograd area, Bulgaria
One very aesthetic – autumn style specimen of chalcopyrite, developed on the base of quartz crystals. Chalcopyrite is secondarily corroded (dissolved and replaced) by pyrite, and the internal pressure of crystalizing crystals crack the mother crystals and cemented these cracks. Chalcopyrite is coated by bornite and covellite during the oxidizing of their surface.
One amazing small specimen of chalcopyrite, sphalerite, galena, quartz and pyrite. Chalcopyrite crystals are corroded and oxidated to bornite and covelite on their surfaces.
An aesthetic cabinet sized specimen of large chalcopyrite crystals, singenetically developed with galena and sphalerite, followed by quartz. In the last stage of crystallization, oxidation creates a thin coating of bornite and covellite.
Well shaped chalcopyrite crystals fallowed by white quartz crystals. Chalcopyrite is particlularly oxidated and coated by bornite and covelite. On some of the crystals some parts are coated by bonite and other by covelite, what most likely is due to dirrection of solutions flowing