Galena, quartz, limonite and unidentified mineral

One excellent and very interesting cabinet size specimen of galena on mother rock, overgrown by clear quartz crystals, and later covered by limonite. Later, on galena and limonite crystalize unidentified secondary copper mineral  (probably result of weathering of chalcopyrite) with beautiful turquoise color. The specimen was found in the fault zone in the abandoned mine in conditions of intensive weathering with water, in the last 30 years.

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

Quartz, galena, chalcopyrite

One very aesthetic specimen of 3 large quartz crystals on the top of galena and chalcopyrite crystals, overgrowth by the second generation small quartz crystals

Quartz, chalcopyrite, sphalerite, galena

One very aesthetic cabinet size specimen of quartz overgrowth by sphalerite, chalcopyrite and second-generation thin quartz crystals. Part of chalcopyrite crystals are coated by bornite and covellite.

Chalcopyrite, galena, sphalerite, pyrite

An amazing miniature specimen of lagre, chalcopyrite crystals, internaly corroded and replaced by galena, sphalerite and pyrite. Chakcpyrite is strongly oxidized and surface in some parts is coated by bornite.

Chalcopyrite, quartz, pyrite and sphalerite

A beautiful cabinet specimen of sphalerite and chalcopyrite followed by pyrite, which corroded chalcopyrite by internal replacement, in some places breaking from inside mother chalcopyrite crystals. #1373