One small, but very nice specimen build in black and opaque sphalerite- marmatite around big transparent quartz crystal. Sphalerite is with skeletal development, overgrowth by large well-terminated cubic galena crystals.
One very aesthetic specimen of galena with black, lustrous well shaped crystals of sphalerite-marmatite.
An excellent, large cabinet size specimen presenting almost full sulfide paragenesys of deposit Madan. Large crystals of chalcopyrite was dissolved and particularly replaced by pyrite, galena and black sphalerite- marmatite.
One very aesthetic large cabinet size specimen, presenting very lustrous sphalerite- marmatite tetrahedral crystals with nice face striation covered by galena, secondary strongly dissolved.
A very rare specimen presenting two kind of sphalerite – marmatite ( black and opaque) and cleophane (transparent with yellow – green color). These two varieties alternate in the specimens and even in the crystals there are zones of marmatite and cleophane with very strong border according planes of cleavage. Morphology of the crystals is tipical for marmatite. Sphalerite covers galena and quartz.
A beautiful and very aesthetic specimen in cabinet size presenting almost full paragenesis set of Madan. Specimen is build in sphalerite, galena and pyrite overgrought by very thin, long axes quartz needles forming space developed net with quartz stars. In the late stage of crystallization were formed small pyrite crystals, used as a seed for developing of transparent quartz crystals,after deposit on galena, pyrite and sphalerite crystals continue their development forming an excellent space net.
An extraordinary cabinet size specimen of space developed quartz with galena, sphalerite, and chalcopyrite, secondary oxidized to bornite and covellite
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.
A miniature size specimen of excellently developed chalcopyrite crystals particularly covered by sphalerite – marmatite and quartz.
A nice specimen of very lustrous long-needles quartz, space developed on the base of galena, sphalerite, and pyrite. Lately on quartz needles were developed calcite aggregates.