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It is found in nature as the mineral chalcocite.
Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins.
The principal ore minerals were chalcocite and native copper.
People have been mining these hills for copper, cuprite and chalcocite since before recorded history.
Mining chalcocite ore started in 1963.
Other products from the mine are chalcocite, chalcopyrite, galena, and sphalerite.
The primary copper minerals found here were the grayish chalcocite and the bright blue-green chrysocolla.
Copper glance (Chalcocite)
Major sulfide minerals are pyrite, chalcopyrite, bornite and chalcocite.
In this locality digenite is found with covellite, chalcocite and bornite.
The copper is present as sulfides (most commonly chalcocite) and malachite associated with organic material; some native silver is also present.
The mineral is associated with chalcocite in zones of secondary enrichment (supergene) of copper sulfide deposits.
The name is from the Greek digenus meaning of two origins in reference to its close resemblance with chalcocite and covellite.
Other minerals mined are Bornite, Pyrite, Chalcocite.
Intergrowths and transformations between djurleite, digenite and chalcocite are common.
These areas are porphyritic, tridymite-bearing rock impregnated with pyrite, chalcopyrite, chalcocite, and, in some places, copper.
The term chalcocite comes from the alteration of the obsolete name chalcosine, from the Greek khalkos, meaning copper.
After the chalcocite ore was exhausted the mines worked malachite and azurite deposits embedded in hydrothermally-altered dolomite.
Above the water table, chalcocite has been oxidized to malachite, azurite, tenorite, and cuprite.
Chalcocite, copper(I) sulfide (CuS), is an important copper ore mineral.
Since chalcocite is a secondary mineral that forms from the alteration of other minerals, it has been known to form pseudomorphs of many different minerals.
The primary copper mineral is chalcocite, which is thought to have been deposited from solutions ascending through the Lisbon Valley Fault.
Associated minerals include chalcocite, atacamite, native copper, diopside, grossular and vesuvianite.
More usually, malachite, azurite, chalcocite and cobalt compounds are more persistent in boxworks and may provide diagnostic information.
The copper is present as chalcocite in veins and irregular replacements in the Triassic Chitistone Limestone.
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