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	Covellite - LoveToKnow 1911 (Site not responding. Last check: 2007-10-08)
		The name covellite is taken from N. Covelli, who in 1839 observed crystals of cupric sulphide encrusting Vesuvian lava, the mineral having been formed here by the interaction of hydrogen sulphide and cupric chloride, both of which are volatile volcanic products.
		Covellite is, however, more commonly found in copper-bearing veins, where it has resulted by the alteration of other copper sulphides, namely chalcopyrite, copper-glance and erubescite.
		It is found in many copper mines; localities which may be specially mentioned are Sangerhausen in Prussian Saxony, Butte in Montana, and Chile; in the Medicine Bow Mountains of Wyoming a platiniferous covellite is mined, the platinum being present as sperrylite (platinum arsenide).
	www.1911encyclopedia.org /Covellite (212 words)

	New Page 1
		Covellite is a fairly rare and not so well distributed mineral.
		Covellite is used as a minor or of copper and as mineral specimens.
		Covellite is a very soft mineral and has a hardness that ranges from 1.5-2 on Moh's hardness scale.
	www.und.nodak.edu /instruct/mineral/geol318/webpage/lannen (216 words)

	Covellite - Wikipedia, the free encyclopedia
		Covellite (also know as covelline) is a crystalline form of copper sulfide (CuS).
		In appearance, covellite is an enchanting indigo blue.
		As described for the mineral pyrite, the assignment of formal oxidation states (or charges) to the atoms that constitute covellite is non-obvious.
	en.wikipedia.org /wiki/Covellite (185 words)

	COVELLITE (Copper Sulfide)
		The structure of covellite is somewhat analogous to the structures of the phyllosilicate minerals.
		In covellite some of the copper ions are at the center of sulfur tetrahedrons that are linked on their bases to form sheets.
		The other copper ions are combined with three sulfur ions in flat triangular groups similar to the triangular groups of the typical carbonates These triangular groups lie in a plane between the tetragonal sheets.
	mineral.galleries.com /minerals/sulfides/covellit/covellit.htm (240 words)

	COVELLITE Chapter 21. Sulfides, arsenides, antimonides, and sulfosalts (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-08)
		Covellite, a copper sulfide mineral, is rare locally, but has been found at Sterling Hill (Frondel, 1972) and may occur at Franklin as well.
		Most specimens labeled covellite are mislabeled; indigo-blue tarnishes on other minerals, chiefly bornite, chalcopyrite, sphalerite, and franklinite, have been mislabeled as covellite.
		Covellite is indigo-blue, platy with perfect cleavage, very brittle, and is found as microscopic crystals with secondary sulfides and within assemblages of altered sulfides.
	simplethinking.com.cob-web.org:8888 /dunn/ch21/covellite.stm (124 words)

	Polish Kupferschiefer Ores (Site not responding. Last check: 2007-10-08)
		Covellite (strongly pleochroic from dark to light bluish gray) cementing quartz (dark gray) sand grains in the upper 2-3 inches of the sandstone beneath the copper shale (Kupferschiefer) in the Rudna copper mine, Poland.
		Covellite (orange) cementing quartz (fl) sand grains in the upper 2-3 inches of the sandstone beneath the copper shale (Kupferschiefer) in the Rudna copper mine, Poland.
		Covellite (dark to light bluish gray) cementing and filling fractures in a clastic quartz (dark gray) sand grain that exhibits mosaic (pieces could be put back together again) brecciation.
	web.umr.edu /~rhagni/Polishores.html (302 words)

	Electrically conductive thermally stabilized acrylic fibrous material and process for preparing same - Patent 4781971
		It is a further object of the present invention to provide an improved electrically conductive fibrous material having covellite copper sulfide in association therewith, wherein the copper sulfide is substantially entirely in the form of covellite copper sulfide.
		By the term "covellite" is meant copper sulfide of a stoichiometric formula CuS, with a crystallographic structure identical to that of the copper sulfide mineral covellite of the same stoichiometry.
		The covellite copper sulfide fibers thus produced have been found to have a fairly stable resistivity over time, although with fibers of relatively high resistivity, the values may be affected by variations in ambient humidity.
	www.freepatentsonline.com /4781971.html (9769 words)

	He Hi She Lo - General Properties (Site not responding. Last check: 2007-10-08)
		Covellite is quite a dense and heavy metallic, indigo blue mineral, and is actually quite difficult to come by.
		Covellite helps you to be more reflective on the way you may have thought about certain issues in the past, particularly if your past thinking may now be causing you problems.
		Covellite is a good stone to meditate with if you want to achieve a particular goal.
	www.hehishelo.co.uk /stones/Covellite.htm (164 words)

	Cuprian Sphalerite
		Zinc and copper exhibit an inverse concentration relation, and comparison with the original sphalerite indicates that the blue phase maintains a metal: sulfur atomic ratio of approximately unity, and may probably be regarded as a cuprian sphalerite.
		X-ray study of material drilled from polished section, and comprising the blue phase, sphalerite, djurleite, and covellite, revealed no lines which could not be ascribed to the last three sulfides, but the very large number of lines yielded by the djurleite could have prevented detection of the weak pattern of an additional mineral.
		Where this occurs, the covellite is intimately associated, not only with minor goethite, but with several minute laths or needles of a very soft opaque mineral with strong bireflectance, from medium-yellow to pale whitish-cream (in air), and extreme anisotropism, from bright apple-green to pale gray.
	www.minsocam.org /MSA/collectors_corner/arc/cusphalerite.htm (1365 words)

	[No title]
		Covellite also helps one to be reflective and acts as a mirror, showing one the defective reasoning which leads to problems.
		The message of covellite is that to be born again is to release the past and to be able to see the present without anxiety and disapproval.
		Placing a piece of covellite on or near the naval chakra tends to stimulate the process; placement on the affected area has also been conducive to relief.
	www.angelfire.com /journal2/serpentandlion/cove.html (500 words)

	Butte ores
		Covellite exhibits a variety of colors due to its extreme reflective pleochoism.
		Depending upon its crystal orientation, covellite may be deep blue, medium blue, or light bluish grey.
		Although part of the white material marked Cc is chalcocite, much of it is covellite with an orientation that gives it a color and reflectance that nearly matches that of chalcocite.
	web.umr.edu /~rhagni/butteores.html (710 words)

	covellite.html (Site not responding. Last check: 2007-10-08)
		FOREST COUNTY: Covellite forms thin supergene coatings on other sulfide minerals at the Crandon deposit (May and Schmidt, 1982; Lamb and Rowe, 1989).
		IOWA COUNTY: Covellite is found with chalcopyrite, chalcocite, galena, sphalerite, pyrite and marcasite at the Pierson Prospect in the NW Sec.
		WINNEBAGO COUNTY: Covellite is reported from the Lutz Quarry, along Route 44 west Oshkosh.
	www.uwrf.edu /~wc01/covellite.htm (116 words)

	Covellite
		Covellite is named for N. Covelli who discovered covellite at Mt. Vesuvius in the 1800s.
		Covellite is usually found as a coating on copper deposits that are enriched with sulfur.
		As with select other copper minerals such as chalcocite, covellite is often irredescent giving it the name "peacock ore".
	www.museums.udel.edu /mineral/mineral_site/collection/alphabetical/C/covellite.html (68 words)

	Minerals of the Cu-S system from the Logatchev field (Mid-Atlantic Ridge) (Site not responding. Last check: 2007-10-08)
		It was concluded that the hexagonal chalcocite was primary formed from high temperature fluids and it was substituted by the non-stoichiometric copper sulfides in succession: djurleite-anilite-geerite-spioncopite-yarrowite.
		Covellite is the final memeber of this range.
		The rare copper sulfide relicts of this association were only preserved now because they were immediately undergone by the sea water action after their deposition causing the formation of secondary copper sulfides.
	www.igem.ru /igem/mine/logatchev.htm (1295 words)

	Activity 22: Covellite or Chalcocite ??? - Maine Geological Survey (Site not responding. Last check: 2007-10-08)
		The mineral covellite, one of the major ores of copper, has the formula CuS and is a simple cupric sulfide.
		While a number of more complex models for the laboratory production of these minerals exists, the basic technique is to heat a given amount of copper, in combination with excess sulfur in a closed crucible under a fume hood.
		Both of these minerals are found in ore deposits in nature and represent a major source of copper.
	www.state.me.us /doc/nrimc/mgs/education/lessons/act22.htm (1512 words)

	Title page for ETD (Site not responding. Last check: 2007-10-08)
		The electronic structure of clean pyrite {100} and covellite {001} surfaces have been investigated in ultra-high vacuum (UHV) for the purpose of understanding the nature of sulfide surface reactivity.
		Covellite, similar to pyrite, is a natural semiconducting metal sulfide.
		Ab-initio calculations predict that cleaving covellite exposes two slightly different surfaces, one is expected to have dangling bonds, the other is not.
	scholar.lib.vt.edu /theses/delayed/etd-51498-1128/etd-title.html (704 words)

	Magnum Receives Encouraging Preliminary Drilling Results for First Two Holes Drilled on the Kuhl Morit Licence : ... (Site not responding. Last check: 2007-10-08)
		Beyond the obvious copper zone and for the remainder of the hole the tourmaline and sericite alteration diminishes and the pyrite becomes fine grained and evenly disseminated.
		In this lower section of the hole the covellite - bornite is not immediately obvious and if present, occurs as fine-grains in association with any coarse-grained pyrite.
		The presence of bornite and covellite is significant and we are awaiting assays."
	press.arrivenet.com /industry/article.php/514441.html (839 words)

	Covellite (Site not responding. Last check: 2007-10-08)
		Covellite showing it deep indigo blue color and foliated nature.
		CRYSTAL GROWTH AND HABITS Most commonly Covellite is found as foliated crystals or massive and less commonly as rosettes of plates.
		OCCURRENCE Covellite is found in copper-bearing mineral veins in the zone of sulfide enrichment - typically below the water table.
	www.gc.maricopa.edu /earthsci/imagearchive/covellite.htm (80 words)

	Magnum Provides Update : ArriveNet Press Releases : Industry (Site not responding. Last check: 2007-10-08)
		Drill hole K04-03 was drilled along a similar azimuth as K04-02 and was collared 50 meters south of drill hole K04-02 to test the possibility of a north-south trend to the mineralization seen in K04-02.
		Sulphide concentrations within the breccia matrix are significant from 66.5 to 90.4 meters with 3% to 5%, locally 10-20%, of mixed coarse-grained pyrite with associated covellite.
		Of special note is the consistent occurrence of the high-grade copper minerals covellite and bornite along with the pyrite in these drill intersections.
	press.arrivenet.com /industry/article.php/631107.html (1585 words)

	Keweenaw Michigan field trip
		Supergene minerals - annabergite, anthonyite, atacamite, azurite, buttenbachite, calumetite, cerargyrite, chrysocolla, covellite, cuprite, dioptase, erthyrite, freirinite, gephardtite, guerinite, gypsum, halite, kaolinite, kinoite, malachite, mirabilite, nantokite, olivenite, paramelaconite, paratacamite, picropharmacolite, plancheite, rauenthalite, tenorite, trichalcite, tyrolite, vladimirite.
		Cliff mine mineralogy – adularia, albite, analcime, azurite, babingtonite, barite, calcite, chalcocite, chamosite, chrysocolla, copper, covellite, cuprite, datolite, epidote, fluorapophyllite, galena, gypsum, hematite, laumontite, microcline, natrolite, prehnite, pumpellyite, pyrite, quartz, silver, sphalerite, tenorite, thomsonite.
		Vein minerals - barite, bastnaesite, bismuth, bornite, calcite, calumenite, chalcocite, chalconatronite, chalcopyrite, chlorite, copper, covellite, cuprite, dolomite, domeykite, galena, greenockite, graphite, illite, malachite, microcline, montmorillonite, molybdenite, pyrite, quartz, silver, sphalerite, synchysite.
	www.minsocam.org /MSA/collectors_corner/vft/mi4b.htm (456 words)

	Text Metalsl (Site not responding. Last check: 2007-10-08)
		Yet, it is the outer crust of the rock that is the actual metal.
		Covellite is good example of what happens when metals are a melted than cooled, most metals solidify into crystalline form.
		The outer crust of Covellite are tiny crystals of metal.
	www.capecodrocks.com /textmetals.htm (126 words)

	covellite mineral cab information
		Covellite (aka covelline) is a crystalline form of copper sulfide (CuS).
		In appearance it is a deep metallic indigo blue (tarnished to purple or fl) with iridescent yellow and red flashes.
		It has also been found in other parts of the world Germany; Austria and South America to name a few.
	topgems.homestead.com /gemstone_information_covellite.html (157 words)

	Bornite (Site not responding. Last check: 2007-10-08)
		However is possible observe zones with secondary sulphides whose main minerals are covellite and chalcocite.
		It is difficult find studies about others minerals such as covellite, enargite, bornite, tennantite, tetrahedrite, and other ones.
		Some times can be confused with covellite but the true color can be identified scratching its surface.
	www.startprospecting.com /html/bornite.html (406 words)

	Alan Guisewite's Mineral Collection Images: Copper Minerals Page
		Covellite (copper (II) sulfide) with pyrite veins from somewhere in Montana.
		This specimen of covellite, pyrite, and chalcopyrite comes from the Leonard Mine near Butte, Silver Bow County, Montana, the best United States occurence.
		The Grace Iron (magnetite) Mine, closed in 1977, was the first (1948) instance of an ore discovery resulting from an airborne magnetometer survey.
	www-2.cs.cmu.edu /~adg/adg-pcuimages.html (5792 words)

	Thesis Excerpts--Tina Takagi
		District sulfide and enargite mineral zonation patterns reveal that pyrite, covellite, and pyrite-included chalcopyrite are essentially ubiquitous in both plan view and cross section.
		Spatial correlation of sulfide mineralization patterns in cross section and plan view with gold grade distribution shows that near hydrothermal breccias, the plus one (+1) ppm gold values are associated with a horizontal zone of sphalerite and galena near the base of the later secondary copper enrichment blanket.
		Gold occurs as 2 micron gold grains in pyrite veinlets cut by coarse-bladed covellite mineralization.
	www.ocf.berkeley.edu /~tktakagi/thesis.html (524 words)

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