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Topic: Sphalerite

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	Sphalerite - Wikipedia, the free encyclopedia
		Sphalerite (ZnS) is a mineral that is the chief ore of zinc.
		The refractive index of sphalerite (as measured via sodium light, 589.3 nm) is 2.37.
		Freshly cut gems are lively with an adamantine luster and could conceivably be mistaken for a fancy-colored diamond in passing, but due to sphalerite's softness and fragility the gems are best left unset as collector's or museum pieces (although some have been set into pendants).
	en.wikipedia.org /wiki/Sphalerite (452 words)

	sphalerite.htm
		ROCK COUNTY: Sphalerite is found associated with galena and marcasite in a quarry and drill core 1.5 km SE of Avon in Sec.
		WINNEBAGO COUNTY: Sphalerite is found in vugs in the Plattevile Formation with galena, marcasite, pyrite, calcite, cerussite and other minerals at the Lutz Quarry in the western portion of Oshkosh on Hwy 44 in T18N R16W (U.S.G.S., 1976).
		Sphalerite occurs as cleavable masses in a breccia cement in the Tullar road quarry, in Neenah.
	www.uwrf.edu /~wc01/sphalerite.htm (2484 words)

	Rocks & Minerals: Sphalerite: Eagle Mine, Gilman, Eagle County, Colorado - Connoisseur's Choice (Site not responding. Last check: 2007-11-07)
		Sphalerite is notable for its dodecahedral cleavage, the six planes of {011}, and its typical resinous to adamantine luster.
		Sphalerite is relatively abundant in the Illinois-Kentucky fluorite district including parts of Hardin and Pope Counties in Illinois and Crittenden and Livingston Counties in Kentucky (Goldstein 1997).
		Sphalerite stalactites to 15 cm in diameter and coated with crystallized marcasite and galena are reported from the Marsden prospect near Galena, Illinois.
	www.findarticles.com /p/articles/mi_m0GDX/is_5_78/ai_107757207 (1169 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		The ore minerals occur in layer and masses, and are pyrite, pyrrhotite, chalcopyrite, sphalerite, galena, magnetite, and siderite.
		The ore minerals are mainly galena, sphalerite, chalcopyrite, marcasite, argentite, tetrahedrite, and pyrargirite.
		The sulfides are mainly galena, sphalerite, chalcopyrite, arsenopyrite, pyrrhotite, and pyrite.
	geopubs.wr.usgs.gov /open-file/of03-220/DATABASE/lode_deposits.txt (20801 words)

	SPHALERITE (Zinc Iron Sulfide)
		Sphalerite is one of the very few minerals that has a total of six directions of cleavage.
		So difficult was sphalerite for miners to distinguish from more valuable minerals such as galena, acanthite and tetrahedrite, that they named it sphalerite which is Greek for treacherous rock and blende is German for blind or deceiving.
		Sphalerite's structure is analogous to the diamond structure.
	mineral.galleries.com /minerals/sulfides/sphaleri/sphaleri.htm (774 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		Sphalerite, ZnS, is the most important ore of zinc.
		Sphalerite is colorless when pure, but naturally occurring samples are usually brown or fl, the darkening occurring as iron substitues for zinc.
		This sample of sphalerite does not display the near-infrared bands typical of either ferrous or ferric ions in other samples, because the iron is not in an octahedral site.
	speclab.cr.usgs.gov /spectral.lib04/DESCRIPT/sphalerite.HS136.html (321 words)

	Sphalerite - Sterling Hill, Ogdensburg, New Jersey (Site not responding. Last check: 2007-11-07)
		Sphalerite {ZnS} is mainly zinc sulfide but contains varying amounts of iron and often traces of cadmium and manganese as well.
		Locally, the term "cleiophane" describes the nearly iron-free sphalerite, especially the variety that fluoresces blue in long-wave and sometimes short-wave UV.
		In normal light the sphalerite is a sparkly, translucent silver to golden color- readily distinguishable from most other minerals of the locality.
	www.njminerals.org /sphalerite-sterling.html (154 words)

	Welcome To Retread Resources! - Personnel
		Because Sphalerite is composed of a metal atom and the non metal atom Sulfur it is part of the mineral classification called Sulphides.
		Sphalerite is the most important zinc mineral and is found closely associated with Galena in the most important deposits of this mineral In some hydrothermal replacement bodies it is associated with Chalcopyrite, Pyrite, Pyrrhotite and Magnetite while Galena if usually not present.
		Sphalerite is a polymorph with two minerals, wurtzite and matraite.
	www.retreadresources.com /html/jan00.html (669 words)

	[No title]
		The sphalerite "distribution however, is not sharply delineated by the epidote-" front and sub-vertical veins and mineralized layers cut across this boundary.
		These textures and mineral relations suggest that the epidote alteration and the sphalerite mineralization were either contemporaneous or that sphalerite precipitated at a slightly later stage of the same alteration event.
		Pyrrhotite 8 0.2-1.0 "Anhedral, skeletal to" "Inclusions of sphalerite, magnetite and" chlorite.
	www-odp.tamu.edu /publications/169_IR/TS/TS1035.TXT (2134 words)

	SME--VIRTUAL ATLAS OF OPAQUE AND ORE MINERALS
		Galena (blue-white, left) is overgrown by botryoidal sphalerite (light grey), which in turn has a botryoidal pyrite rim (yellow-white, centre).
		Sphalerite (dark grey, bottom left) is overgrown by banded pyrite (yellow-white, centre) and marcasite (blue-white), which shows reflection pleochroism (blue-white to white-blue, centre top) and bireflectance.
		Sphalerite crystals display abundant light yellow to brown internal reflections and are cemented by bournonite, which shows its characteristic polysynthetic twinning on (110) 'parquet-twinning' (centre).
	www.smenet.org /opaque-ore/plate55.htm (333 words)

	Sphalerite Data (Site not responding. Last check: 2007-11-07)
		Sphalerite is ideally a zinc sulfide; however, there is usually some quantity of iron substituting for zinc in the structure.
		Sphalerite is the most important ore mineral of zinc.
		Sphalerite commonly has a resinous luster, and is commonly found in association with galena.
	www.uwm.edu /Course/422-100/Mineral_Rocks/sphalerite.data.html (130 words)

	The mineral sphalerite
		Sphalerite is a common mineral, and occurs in many different colors.
		Sphalerite is an important mineral to collectors, and some transparent varieties are occasionally faceted for collectors.
		Sphalerite is a rather common mineral, and there are many localities where fine specimens have come from.
	www.minerals.net /mineral/sulfides/sphaleri/sphaleri.htm (438 words)

	Cuprian Sphalerite
		One, apparently a cuprian sphalerite (nil to 15±2 percent Cu.), formed as an intermediate stage in the replacement of sphalerite by djurleite.
		Grain contacts between sphalerite and djurleite normally appear sharp when viewed in polished sections, but in some specimens from the 25 m level and dumps of Mina San Samuel, and from Mina Flor del Llano, an intermediate zone of a pale blue, slightly anisotropic phase intervenes between the hypogene and supergene sulfides.
		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.
	www.minsocam.org /MSA/collectors_corner/arc/cusphalerite.htm (1365 words)

	Sphalerite Zinc Ore from Baffin Island, Nunavut, Canada
		Sphalerite is zinc sulphide, ideal formula ZnS, the principal ore mineral of zinc.
		A cubic mineral, specific gravity near 4.08, sphalerite is an economically- important sulphide which is generally translucent to transparent, unlike other opaque metallic ore minerals.
		Sphalerite may display a wide range of colours, from pale yellow or green to rich brown and fl.
	www.turnstone.ca /nanis.htm (611 words)

	Sulfides (Site not responding. Last check: 2007-11-07)
		Sphalerite, is also called zinc blende or fljack and is a common vein-forming mineral in numerous mines in central and western Kentucky, where it has been mined.
		Sphalerite has been mined from the Hutson Mine in Livingston County, and the Lexington Quarry Company has mined sphalerite from a vein deposit in Jessamine County for several years, producing very fine, dark-brown to fl, tetrahedral crystals.
		Germanium and gallium, also trace elements in sphalerite, are produced as by-products of sphalerite in the fluorspar area in western Kentucky.
	www.uky.edu /KGS/coal/webrokmn/pages/sulfides.html (674 words)

	WHAT'S NEW? - Thomas S. Warren Museum of Fluorescence (Site not responding. Last check: 2007-11-07)
		The sphalerite in this specimen, despite its evident abundance, is inconspicuous in daylight.
		A large and texturally fascinating specimen of fluorescent sphalerite from the Nanasivik mine, Baffin Island, Canada, was recently donated to the museum by mine geologist Gary Dyck.
		Fluorescent sphalerite had been found at this locality before, but the new specimens are far brighter than their predecessors and are easily comparable in overall attractiveness to sphalerite from such other well-known localities as Bisbee and Tsumeb.
	www.sterlinghill.org /warren/whatsnew_aug_02.htm (1108 words)

	Sphalerite (Site not responding. Last check: 2007-11-07)
		The name sphalerite is derived from a Greek word meaning treacherous, in allusion to the ease with which the dark-coloured, opaque varieties are mistaken for galena (a valuable lead ore).
		In the United States the most important sphalerite deposits are those in the Mississippi River valley region.
		Sphalerite also is distributed worldwide as an ore mineral in hydrothermal vein deposits, in contact metamorphic zones, and in high-temperature replacement deposits.
	www.csupomona.edu /~geology/alert/sphalerite.htm (148 words)

	Sphalerite
		Sphalerite also known as blende, is an important ore of zinc.
		Sphalerite crystals are usally pseudo octahedral in shape, forming in hydrothermal veins with other minerals such as gelena, quartz, pyrite and calcite.
		In the past sphalerite has often been confused with gelena (lead sulfide) to which it is very similar.
	www.vagoldandgems.com /sphale.html (115 words)

	Rocks & Minerals: A 1946 Find of Gem Sphalerite Crystals at the Balmat Zinc Mine, St. Lawrence County, New York (Site not responding. Last check: 2007-11-07)
		Claude mentioned that there were more sphalerite crystals along with small green diopside crystals in his brother's possession; an attempt was made to obtain them, but nothing came of it except for two small sphalerite crystals received during a visit.
		Jean died in 1988, but it was not until December 1994 that a telephone call to Claude revealed that a cigar box with the remaining sphalerite crystals had been found in his brother's effects; however, none of the diopside crystals were in the lot.
		Flattened, opaque dusty-yellow sphalerite crystals to 1 cm from the alteration zone are not at all typical of the species.
	www.findarticles.com /p/articles/mi_m0GDX/is_1998_Nov/ai_53356000 (1437 words)

	sphalerite (Site not responding. Last check: 2007-11-07)
		Sphalerite has a lovely adamantine luster because of its high index of refraction, and it has a fire even greater than a diamond's.
		Sphalerite is found in many places around the world, and some of the most interesting fluorescent types are found at Franklin, New Jersey, and the nearby Sterling mine at Ogdensburg, New Jersey.
		Sphalerite is also a polymorph with the two minerals matraite and wurtzite because they have the same chemistry but different chemical structures and shapes.
	academic.evergreen.edu /curricular/MN/sphalerite.htm (522 words)

	RESULTS
		Sphalerite is present both in veins and vesicle linings.
		Sphalerite was seen associated with chalcopyrite and, in some cases, on the edge of pyrite crystals.
		It occurs as fine inclusions in three different minerals: (1) on the edge of sphalerite grains associated with hydrothermal silica vein, (2) filling voids and/or lining vesicles in quartz, and (3) as inclusions in pyrite.
	www-odp.tamu.edu /publications/193_SR/203/203_4.htm (866 words)

	New Page 342
		Highly lustrous, deep brown Sphalerite crystals are placed in a continuous U-shaped band around medium to light pink, disc shaped Rhodochrosite crystals.
		All of the Rhodochrosite and Sphalerite is in great condition on this 2¼ x 2 x 1¾" specimen.
		There is some quite visible damage to the side of the specimen, but the Sphalerite if very bright, quite lustrous and exhibits a nice internal red color that is visible under normal light conditions.
	www.cyberocks.com /new_page_342.htm (449 words)

	Encyclopedia: Sphalerite
		This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band).
		DODGE COUNTY: Sphalerite was found with galena and calcite in vugs in the Galena Formation in the SE Sec.
		Sphalerite is common in drill core from the Defense property in the SE sec.
	www.nationmaster.com /encyclopedia/Sphalerite (1426 words)

	Physical Properties of Sphalerite
		Sphalerite is a member of the Sulfide group of mineral, it occurs in similar enviroments to Galena and resembles the mineral Siderite.
		The name sphalerite is a Greek word for treacherous, which alludes to the common mis-identification with these other minerals.
		The chemical formula for sphalerite is ZnS and it is used as a primary ore mineral for mining of Zinc.
	www.und.nodak.edu /instruct/mineral/geol318/webpage/milford/propertiesright.html (97 words)

	sphalerite on Encyclopedia.com (Site not responding. Last check: 2007-11-07)
		SPHALERITE [sphalerite], mineral composed of zinc sulfide, usually containing some iron and a little cadmium.
		It is transparent to translucent and varies greatly in color, iron-free specimens being pale yellow and those with iron being brown, red, fl, or green.
		The most important source of zinc, sphalerite is a widely distributed mineral that commonly occurs in association with galena.
	www.encyclopedia.com /html/s1/sphaleri.asp (289 words)

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