argentite


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Related to argentite: Acanthite

argentite

[′är·jən‚tīt]
(mineralogy)
Ag2S A lustrous, lead-gray ore of silver; it is a monoclinic mineral and is dimorphous with acanthite. Also known as argyrite; silver glance; vitreous silver.
References in periodicals archive ?
In the summer of 1908, the town council and the Coniagas Mining Company argued over ownership of the north end of Argentite Street.
Period/stages Hydrothermal period Minerals Stage 1 Stage 2-1 Arsenopyrite Pyrite Pyrrhotite Chalcopyrite Sphalerite Galena Pyrargyrite Argentite Limonite Malachite Quartz Sericite Calcite Epidote Fluorite Veins A veins B veins System NaCl-[H.sub.2]O-C [H.sub.4]-C[O.sub.2] Period/stages Hydrothermal period Supergene Minerals period Stage 2 -2 Stage 3 Arsenopyrite Pyrite Pyrrhotite Chalcopyrite Sphalerite Galena Pyrargyrite Argentite Limonite Malachite Quartz Sericite Calcite Epidote Fluorite Veins C veins D veins System NaCl-[H.sub.2]O
Native silver and argentite, thought to be secondary in origin, were found in the Pleistocene ice that filled open spaces in the veins.
Werner Quellmalz exhibited some marvelous Eastern Europe pieces including choice pyrargyrite, argentite, silver, a huge Johanngeorgenstadt pyromorphite 9 inches across and a delicately colored violet fluorapatite from Ehrenfriedersdorf.
The most common are, native silver (Ag), argentite ([Ag.sub.2.S]), and cerargyrite (AgCl).
The main silver-bearing minerals include nature silver (Figure 4(c)), argentite, and acanthite, and minor freibergite and sternbergite are also reported [13].
Acanthite (paramorphic after argentite) has been known for some time in crystals to about 1 cm, but in 2000 the mine produced a few sharp, lustrous acanthite crystals to 3 cm, some of them on a matrix of pale-colored rhodochrosite.
The principal minerals found are argentite, aguilarite, naumanite, and guanajuatite, and it has been shown that contaminants such as arsenic, selenium, and antimony decrease with depth; thus minerals such as pyrargyrite and proustite also become rarer as mining goes deeper into the Earth.
He was drilling in rich ore, which was very difficult and time-consuming because of the soft and solid nature of the native silver and argentite. After blasting, he saw signs of a pocket underfoot.
Originally Beutell had been experimenting with the synthesis of argentite and had noted the development of growths of pure silver on the synthetic sulfide he was producing.
Of course the collection also contains some top-quality specimens of more predictable German things (Freiberg silver and argentite and stephanite, Andreasberg pyrargyrite and calcite, Ems pyromorphite, Stassfurt anhydrite, Hagendorf phosphates, etc.), as the photos here suggest.
Acanthite ("argentite") was once an important ore mineral in the oxide-sulfide transition zone at Potosi, finely disseminated in limonite, but is now rarely encountered.