One very nice , cabinet size specimen of well terminated cubic pyrite crystals, covered by quartz strongly oxidated to bornite in some parts of the specimen.
Тип минерал: bornite
Chalcopyrite, bornite, covelite, quartz – rock crystals
One stunning cabinet size specimen of several chalcopyrite crystals,coated by bornite and covelite and covered by transparent, radial developed quartz crystals.
Pyrite after chalcopyrite pseudomorph with bornite and covelite
An extraordinary specimen showing typical for Madan secondary dissolvation and replacement of chalcopyrite by pyrite. The large chalcopyrite crystals are internaly dissolved and replaced by sphalerite and pyrite. In the end of mineralisation process, take part oxidation and coating of chalcopyrite by bornite and covelite
Space developed quartz-rock crystal with chalcopyrite,sphalerite and galena
An extraordinary cabinet size specimen of space developed quartz with galena, sphalerite, and chalcopyrite, secondary oxidized to bornite and covellite
Needle quartz pyrite, sphalerite and galena
A very nice and aesthetic specimen of Longaxes needle quartz overgrought sphalerite, galena, and sphalerite. There are light oxidation signs on pyrite as result of coating by bornite.
Galena, sphalerite, pyrite and needle quartz-rock crystal
A very attractive specimen, presenting very well space developed long-axes transparent needle quartz, covering sphalerite, galena, and pyrite crystals
Quartz with rainbow pyrite
A unique for Bulgaria specimen presenting space developed transparent quartz – rock crystal with very well terminated shiny pyrite crystals coated by iridiscenting bornite and covellite as result of oxidation of , most likely coating of chalcopyrite
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.
Needles quatz-rock crystal, pyrite, galena and sphalerite
A very aesthetic cabinet size specimen of long-axes needle quartz crystals, with very lustrous crystal faces, overgrowing base of combined sphalerite and galena small crystals and a little bigger pyrite crystals, showing in some places traces of oxidation and coating by bornite.
Halcopyrite and quartz
An aesthetical specimen of large quartz crystals with also large chalcopyrite crystals, which secondary become subject to strong oxidation, what change the surface of the chalcopyrite and color it in red and on places blue color by forming coating of bornite and covelite