Info: Antimonate crystals are usually in needle form. Antimonate have steel grey colour, its opaque and it have strong metalic shine. Commonly found are agregates of antimonate of various forms, or grain and massive masses. Antimonate is soft, heavy and can be cutted easly.
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Info: Covellite is usually found in grain or whole masses. Typical for the mineral is his dark blue to black colour, and with half-metalic shine covellite is loved by collectors, because of this. Covellite is very soft but very heavy mineral. Leaf forms of the mineral can be bend without...
Info: Galena crystals are usually cubical in form and lead-grey in colour. Opaque with strong metalic shine. Commonly galena is found as agregates or in form of grain.
Found: In USA, Australia, England, Mexico, Germany. In Czech Republic is found in Příbramsko, Stříbro, Kutná...
Info: The crystals of cinnabar usually have trigonal form, but good developed crystals are very rare. Most commonly cinnabar is found in agregate or just dusty covers for other crystals. Typical for cinnabar is the red colour of the mineral. His shine is diamond-like. The colour of cinnabar is...
Info: Crystals from this kind of mineral sometimes reach 15 cm. Tetrahedrite is usually found in tetraedrical form. This mineral can also form agregates. Tetrahedrite is found usually bound with his arsenic analog mineral tennantite. It has steel grey colour with strong metalic shine....
Info: The crystals of sphalerite are in cubical form. It can often contain a traces of other metals as iron, manganese, cadmium, sometimes even indium and gallium. His colouration varies from red to yellow to brown. Crystals with more iron then sulfur have metalic shine, others have more...
Info: From chemical view argentite is clear form of silver sulfide. Sometimes it can contain selenium. Crystals of argentite are usually irregulary shaped. Argentite has lead grey or black colour. Argentite can be created only in temperature more than 173 degrees by celsium, in lower...
Info: Bornite is found usualy in the form of grains or masses of grey-red colour. Good developed cubical, rombododekaedrical and oktaedrical crystals are rare.
Found: Known deposits of bornite were found in Butte, Montana (USA), Tsumeb (Namibia), Tamaya (Chille) and Transwaal (South...
Info: Chalcocite is often in shape of pseudohexagonal crystals, or in the shape of prism. Chalcocite's colour varies from dark grey to black. Often is found near other minerals of copper.
Found: The most famous locations of chalcocite mineral are Cornwalle (UK), Ural (Russia), Tsumeb...
Info: Dyscrasite or antimony silver creates crystals in form of twins - in the form of bypyramide. Usually dyscrasite is found in rough masses or grain agregates of white colour.
Found: Important deposits of dyscrasite are St. Andreasberg (Germany), Markirch (France), Kongsberg (Norway),...
Info: Crystals of chalcopyrite are usualy found in tetragonal form, pseudotetraedric crystals are very rare. The mineral is usualy found as whole masses of yellow colour with light green shadows. Common chalcopyrite have metal shine. Typical for this mineral is founding of twin...
Info: This well-known mineral, known even to the ancient greeks, often forms beautifull cubical crystals.
How to Recognize: Pyrite is very simillar to gold, but it is harder than gold. In places with moisture releases sulfur acid and transforms to a red-brown limonite and white sulfites....
Info: Clear arsenopyrite is rare, mostly the arsenopyrite binds with metals as silver or cobalt. Danaite is arsenopyrite with less iron then cobalt. Often crystalizes in long one-clonal forms. It can be found also in massive agregates and grains. Aresnopyrite is opaque, tin-white with from...
Info: The six-sided crystals of molybdenite are very simillar to graphite. Molybdenite often forms thin agregates. Its opaque sulfide with strong metalic shine, darkgrey colour with purple shade. Molybdenite is relatively soft, but heavy.
How to Recognize: Frop graphite the mineral can be...
Info: Usually found in masses, rammelsbergite is found also in grain and agregate forms. Little crystals are rare. This sulfide have tin white colour with pink shade.
How to Recognize: When exposed for long time to wind, the rammelsbergite is concealed by the green annabergite.
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Info: Usually found in whole masses with red colour, its translucent and sometimes even transparent.
How to Recognize: When exposed to light in time becomes covered by dark silver alloy.
Found: Famous species of this mineral were found in Chanarcillo (Chille). Interesting species were...
Info: This mineral is found in the same crystal shapes as proustite. Pyrargyrite contains silver and it have dark red colour. Sometimes is translucent and it have from metalic to diamond shine. Crystals of this mineral are among others, favourite crystals for collectors.
How to Recognize:...
Info: Crystals of this mineral are very valuable among collectors for their double-sided structure. Bournonite is often found among tetraedrite, sfalerite, chalcopyrite, galenite, pyrite arsenopyrite and others. Crystals of bournonite are coloured from grey to black.
How to Recognize: It...
Info: Crystals of auripigment usually are little, the biggest measure five and more centimeters. Its commonly found in forms of agregates. Auripigment have golden yellow colour, crystals are usually in orange. It have a oily shine. This mineral is relatively heavy, but very soft.
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Info: Realgar is often found in form of agregate. It is translucent to transparent, with intensive red to orange red colour. Realgar have from oily to diamond shine, and it can be cutted with knife.
How to Recognize: It must be protected from direct sunlight, because when put on light the...
