One amazing small specimen of mixed quartz-calcite aggregate followed by galena and covered by not identified (yet) secondary copper mineral- most likely hemimorphite or chrisocola.
Тип минерал: calcite
Calcite, quartz-rock crystal, green quartz, pyrite and galena
A rare and very beautiful specimen of galena and pyrite followed by clear long quartz crystals, covered by green quartz colored by chlorite and overgrowth by thin grain calcite. On the top of the specimen is developed large translucent calcite crystal with clearly twined down part of the crystal
Chrysocolla, galena, calcite
One excellent small specimen of oxidized galena, covered by calcite followed by chrysocolla and other secondary copper minerals.
Quartz after calcite pseudomorph
An outstanding and very aesthetic cabinet size specimens presenting thin quartz „skin“ on the top of the steep calcite scalenohedron specimens. In the latest stages of crystallization, a bigger part of calcite crystals were dissolved and in some parts of the specimen could be seen the hallow cast forms creeping the calcite shape, but consisting only quartz.
Chalcopyrite, galena, sphalerite, calcite, quartz
One very rare cabinet size specimen, presenting chalcopyrite, galena, sphalerite, quartz, and calcite. The chalcopyrite crystals are very unusually elongated in the direction of „C“ ax, instead of the usual tetrahedral crystals.
Calcite-manganocalcite, rainbow pyrite, sphalerite, quartz
One excellent and very aesthetic, cabinet size specimen of thin flat crystals of calcite-manganocalcite ( paperspat) developed on rainbow pyrite, quartz and lustrous crystals of sphalerite- marmatite and quartz.
Feather like split calcite crystals
A unique, very aesthetic cabinet size specimen, of split calcite crystals on the base of rhombohedral calcite crystals. The permanent split of the crystals make forms like feathers which are translucent to transparent neer to the end of the aggregate.
Transparent sphalerite- cleophane, quartz, barite, pyrite, calcite
One extremely rare cabinet size specimen, presenting massive transparent sphalerite-cleophane with pyrite, overgrowth by quartz and in the end of cristalization proccess covered by barite and calcite.
Amethyst, calcite, siderite
An outstanding cabinet size specimen of amethyst with dark – indigo color, steep calcite crystal with a slightly dissolved scalenohedral habit, and small crystals of siderite with gold color.
Galena, calcite, sphalerite, chalcopyrite, bornite, covelite
A very interesting specimen, of black sphalerite – marmatite and chalcopyrite, overgrowth by large galena cubic crystals, followed by flat rhombohedral calcite crystals. In the late stage of crystallization, galena was strongly dissolved and some of the crystals are particularly destroyed. Could be seen typical „fingerprint“ dissolution, but the surfaces stay mirror lustrous. Probably the same process was the reason for appearance of „rainbow chalcopyrite surfaces“ – the result of the coating by bornite and covellite.
size 110 x 65 x 50 mm – weight 311,7 grams