One very interesting, strongly weathered, large cabinet-size specimen of black sphalerite-marmatite and quartz, covered by very well-developed chalcopyrite crystals, lately internally corroded and replaced by pyrite.
Тип минерал: covelite
Chalcopyrite, Galena, sphalwrite-marmatite, quartz and rhodochrosite
One unique specimen of galena, overgrowth by large bright chalcopyrite crystals with very aesthetic striation on the crystal faces and followed by quartz and black sphalerite – marmatite. In the end of the crystallization process crystalized several beautiful hallow rhodochrosite crystals, following the shape of dissolved calcite crystals.
Chalcopyrite, pyrite, bornite, covelite
An outstanding and extremely rare specimen of pseudomorph of pyrite after sphalerite and chalcopyrite, on quartz.. Giudurska mine, Erma reka, Zlatograd area, Bulgaria
Chalcopyrite, quartz, galena, sphalerite, bornite and covelite
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.