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Topic: Natrolite

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	Natrolite - Wikipedia, the free encyclopedia
		Natrolite is a tectosilicate mineral species belonging to the zeolite group.
		Natrolite is readily distinguished From other fibrous zeolites by its optical characteristics.
		Natrolite occurs with other zeolites in the amygdaloidal cavities of basaltic igneous rocks.
	en.wikipedia.org /wiki/Natrolite (393 words)

	NATROLITE - LoveToKnow Article on NATROLITE
		Needle stone or needle-zeolite are other names, alluding to thr common acicular habit of the crystals, which are often ver~ slender and are aggregated in divergent tufts.
		Natrolite is usually white or colorless, but sometimes reddish or yellowish.
		The walls of cavities in the basalt of the Giants Causeway, in Co. Antrim, are frequently encrusted with slender needles of natrolite, and similar material is found abundantly in the volcanic rocks (basalt and phonolite) of Salesel, Aussig and several other places in the north of Bohemia.
	www.1911encyclopedia.org /N/NA/NATROLITE.htm (298 words)

	Probert Encyclopaedia: Rocks and Minerals (N) (Site not responding. Last check: 2007-10-21)
		Rocks and Minerals (N) Natrolite is a colourless, white, or yellow zeolite mineral consisting of sodium aluminium silicate in the form of needle-like orthorhombic crystals and a relative hardness of 6.
		Natrolite is most often found in cavities in basalt.
		Natron is a whitish or yellow mineral that consists of hydrated sodium carbonate and occurs in saline deposits and salt lakes.
	www.probertencyclopaedia.com /HE.HTM (339 words)

	natrolite.htm (Site not responding. Last check: 2007-10-21)
		Description: Natrolite is a member of the zeolite family that occurs most frequently in veins and as amygdule fillings in basaltic rocks.
		Natrolite is found in amygdules in basalt in the SE SW Sec.
		DOUGLAS COUNTY: Natrolite was tentatively identified in thin veinlets with phillipsite (?) and calcite in gouge cutting basalt along the Douglas Fault exposed along the Amnicon River in Amnicon Falls State Park (SE Sec.
	www.uwrf.edu /~wc01/natrolite.htm (132 words)

	NATROLITE (Hydrated Sodium Aluminum Silicate)
		Natrolite's structure has a typical zeolite openness about it that allows large ions and molecules to reside and actually move around inside the overall framework.
		Natrolite, a sodium zeolite, scolecite, a calcium zeolite, and mesolite, a calcium and sodium zeolite, are closely related and sometimes found together.
		Natrolite tends to forms thin crystals with pyramidal terminations, but mesolite's fiber-like crystals are usually the thinnest of the three.
	mineral.galleries.com /minerals/silicate/natrolit/natrolit.htm (367 words)

	Rocks & Minerals: Recent Findings of Unique Mineralogical Specimens on the KOLA Peninsula (Site not responding. Last check: 2007-10-21)
		Ten meters lower on the slope are blocks composed of natrolite and feldspar that apparently are remnants of the core of the vein.
		Natrolite occurs in porous intergrowths of elongated prismatic crystals (to 5 cm long) and as fine-grained pseudomorphs after hexagonal crystals, probably cancrinite, which reach 4 cm in length and 1 cm in diameter.
		In the marginal parts of aegirine spherulites are numerous voids to 4 cm in which are found semidissolved relicts of natrophosphate and subhedral or anhedral natrolite crystals as well as druses of small (to 2 mm) colorless crystals of umbite and dark brown crystals of sazykinaite-(Y) that are 1-5 mm in size.
	www.findarticles.com /p/articles/mi_m0GDX/is_1_76/ai_69201588/pg_2 (1355 words)

	SCOLECITE - LoveToKnow Article on SCOLECITE (Site not responding. Last check: 2007-10-21)
		It is a lime-zeolite, and like the soda-zeolite natrolite and the soda-limezeolite mesolite, usually occurs as acicular and fibrous aggregations.
		Although having nearly the same interfacial angles as the orthorhombic natrolite, it crystallizes in the monodinic system, and, as shown by the etched figures and the pyroelectric character, in the hemibedral class of this system, there being a plane, but no axis, of symmetry.
		Scolecite can therefore be distinguished from natrolite by an optical examination, since the acicular crystals do not extinguish parallel to their length between crossed nicols.
	www.1911encyclopedia.org /S/SC/SCOLECITE.htm (209 words)

	Cleaning Benitoite Specimens (Site not responding. Last check: 2007-10-21)
		Natrolite - White massive material that composes the bulk of the veins.
		Start with the areas thickest in natrolite and dissolve them down first, apply wax around any exposed crystals and anywhere the etching process could destroy the integrity of the specimen.
		Another observation early on was that the natrolite etches very differentially causing some serious "wormholes" to appear in some areas.
	members.cox.net /dbcoooper (859 words)

	[No title]
		Radiating natrolite occurring in amygdales and in irregular cavities was recorded by Gee (1971).
		The presence of thomsonite was confirmed by XRD as one of the minerals occurring as a chalky white fibrous material at the base of natrolite sprays.
		Most specimens are intergrowths with natrolite and occur rarely as individual sprays on phillipsite.
	www.chez.com /mineralzine/ancien/info5-1-b.htm (727 words)

	Natrolite (Site not responding. Last check: 2007-10-21)
		Radiating fibrous crystals of Natrolite in a basalt vug from the Horseshoe Dam area of Arizona.
		This close up view shows the delicate fibrous crystals of Natrolite radiating outward from its point of origin on the wall of the basalt vug.
		OCCURRENCE Natrolite is a zeolite that forms in vugs or cavities in basaltic rocks.
	www.gc.maricopa.edu /earthsci/imagearchive/natrolite.htm (134 words)

	Information about the mineral specimen or Crystal Mesolite, Natrolite and Scolecite
		Natrolite tends to forms thin crystals with pyramidal terminations, but mesolite's fibrous crystals are usually the thinnest crystals of the three minerals.
		This structure has opeanings in it, that allow other ions and molecules to reside in and actually move around in these framework or "cage" structures.
		Poona, India; The Deccan basalt flows that cover 200,000 square miles of west central India are a prime source of fabulous zeolite specimens.
	www.minerals-n-more.com /Mes-Nat-Sco_Info.html (420 words)

	Benitoite Mine & Mineral Specimens - Trinity Mineral Company
		specimen of natrolite and crossite with a fine grouping of interesting crystals - rich deep blue benitoite to 1.2 cm across, neptunite crystals to 1.7 cm in length and several small crystals of the rare copper sulfide djurleite that reach up to 2.5 mm across.
		specimen of natrolite and crossite with a a mess of benitoite and neptunite crystals.
		The crystals on this specimen were detached from the wall rock during the natrolite phase of mineralization.
	www.benitoitemine.com /benitoite/min-spec.shtml (1446 words)

	Odyssey Magazine - Science Scoops - Chemistry
		They placed a natrolite crystal in a cell filled with a water-alcohol mixture and then squeezed it between two diamond anvils to pressures up to 50,000 times normal atmospheric pressure.
		An X-ray analysis of the expansion suggests that the material expanded because water molecules from the water-alcohol solution were squeezed into the pores within the natrolite, causing it to temporarily expand.
		The researchers have already come up with a use for natrolite, namely as a crystal sponge for chemical cleanups.
	www.odysseymagazine.com /pages/ss/chemistry.php?print (898 words)

	NEWS
		In June 2000 a pegmatite dike was blasted in Håkestad larvikite quarry in Tjølling.
		The pegmatite was strongly hydrothermally altered, and most of the primary minerals (feldspars, amphiboles, biotite) were gone on the expence of huge amounts of natrolite, analcime and chlorite.
		The second generation natrolite occurs as thick prismatic crystals, often somewhat tapering, which protrudes from the base of the first generation of natrolite which occurs as tiny crystals covering the wall of the vugs, including large plates of calcite.
	home.c2i.net /aolarsen/News.htm (1026 words)

	Benitoite Mine & Mineral Specimens - Trinity Mineral Company
		specimen of natrolite and crossite with several lustrous crystals of neptunite to 2.8 cm in length.
		specimen of natrolite and crossite with over a dozen crystals of benitoite ranging in size up to 2.1 cm across which is considered quite large for the species.
		specimen of crossite and natrolite with abundant lustrous crystals of jet fl neptunite to 3.3 cm in length.
	www.benitoitemine.com /benitoite/cab-spec.shtml (1200 words)

	Natrolite, rock, crystal, mineral, gem stone, birth stones - mineralgallery
		Natrolite, rock, crystal, mineral, gem stone, birth stones - mineralgallery
		In the Kalahari Manganese field natrolite was found in the drill cores but no well formed crystals were known untill those found with inesite 1992 at the Wessels mine.
		The natrolite occured as prismatic crystals up to 10 cm long and many specimens consist of stellate groups composed of 2 to 3 cm long crystals.
	www.mineralgallery.co.za /natrolite.htm (106 words)

	benitoite & neptunite (Site not responding. Last check: 2007-10-21)
		Specimen of natrolite and crossite with a half dozen or so deep blue benitoite crystals to 1.8 cm across.
		Specimen of crossite and natrolite hosting lustrous crystals of neptunite to 0.7 cm in length.
		specimen of natrolite and crossite with several of brilliantly lustrous neptunite crystals to 1.4 cm in length.
	www.webmineralshop.com /america_benitoite.htm (134 words)

	NATROLITE - Online Information article about NATROLITE
		zeolites natrolite is readily distinguished by its See also:
		Antrim, are frequently encrusted with slender needles of natrolite, and similar material is found abundantly in the volcanic rocks (basalt and See also:
		Fargite is a red natrolite from Glenfarg in See also:
	encyclopedia.jrank.org /NAN_NEW/NATROLITE.html (536 words)

	Natrolite Mineral Data
		Comments: Druse of gemmy, red eudialyte crystals to 1 mm on white natrolite.
		Comments: Jet-fl square prisms of neptunite etched out of the enclosing white natrolite with minor benitoite.
		Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime.
	webmineral.com /data/Natrolite.shtml (266 words)

	Fluorescent Minerals of the Ilimaussaq Complex (Site not responding. Last check: 2007-10-21)
		It appears natrolite, and a closely related mineral — tetranatrolite, is responsible for much of the green FL found on many fluorescent minerals from Greenland.
		In some pieces the natrolite appears to form into a sugary crust (much like albite) and covers large areas of the specimen — providing a pleasing green FL ranging from very bright to quite subdued.
		Natrolite crystals have also been found which do not fluoresce.
	www.minershop.com /html/pg_6.html (932 words)

	Billy Bob's page about Wren, OR.
		Some pockets are full of just natrolite, some just calcite, some have neither.
		First clay lined the pocket removing iron and a couple other elements from the system; then natrolite hairs up to an inch long formed; then came analcime, apophyllite, and laumontite; and finally large yellow calcite crystals grew.
		Also, the natrolite hairs hide the analcime and apophyllite, so I sometimes take home kinda ugly pieces of natrolite with the intention of brushing them off with compressed water to expose the other crystals.
	members.tripod.com /~WTompkins/index-25.html (503 words)

	Benitoite Mine - Raw material
		Most of the natrolite was less then 1 cm thick indicating that any xls underneath would be usually less than 1 cm.
		The natrolite cover was thin, generally less than 0.5 cm and there was nothing showing.
		This piece had a lot of relatively thick natrolite on it, although it was somewhat irregular.
	www.trinityminerals.com /benitoite/testim.shtml (2973 words)

	natrolite -- Encyclopædia Britannica
		It has been found in the form of colourless or white, glassy, slender crystals or fibrous masses filling cavities or fissures in basaltic rocks, as in Trentino, Italy; Brevik, Nor.; Belfast, N.Ire.; the Faroe Islands; and northeastern New Jersey, U.S. Natrolite was one of the first...
		mineral of the zeolite family, similar to natrolite (q.v.).
		mineral closely related to natrolite (q.v.), a member of the zeolite family.
	www.britannica.com /eb/article-9055034?tocId=9055034 (167 words)

	world wide mineral specimens
		The lime green natrolite soda straw (hollow tube) formation is a tuberose form with irregular protuberances on the surface.
		Natrolite is a zeolite from the basaltic trap rock of Poona Province, India.
		Zeolites (melts in blow pipe test) are formed when water percolates through porous basal, depositing minerals.
	www.minertown.com /market/specimens/other (2039 words)

	Benitoite from The Gem Mine, San Benito County, California (Site not responding. Last check: 2007-10-21)
		The crystals grew in cavities in a glaucophane schist.
		If the natrolite is dissolved with strong acid, one is occasionally able to reveal hidden benitoite crystals.
		Shown above is a fine thumbnail-sized specimen of benitoite crystals exposed by etching away with acid the encasing white natrolite.
	www.mtlilygems.com /Minerals/M283.html (148 words)

	Bob's Rock Shop: Benitoite with Neptunite and Natrolite (Site not responding. Last check: 2007-10-21)
		It is associated with neptunite, natrolite, crossite and albite.
		Neptunite exhibits elongated, prismatic, fl to dark brown crystals which may be opaque or translucent.
		It is found lining cavities in basalts and other lavas and is associated with calcite and zeolites.
	www.rockhounds.com /rockshop/benito1.html (141 words)

	Mineral Specimen for sale of Natrolite from Chimney Rock Quarry, Bound Brook, New Jersey. (Site not responding. Last check: 2007-10-21)
		Natrolite from Chimney Rock Quarry, Bound Brook, New Jersey.
		This mineral specimen of Natrolite from Chimney Rock Quarry, Bound Brook, New Jersey is available for sale from John Betts - Fine Minerals, mineral dealer located in New York City, New York.
		Description: Doubly-terminated crystal of transparent, colorless natrolite with a partial coating of greenish heulandite microcrystals.
	www.johnbetts-fineminerals.com /jhbnyc/gifs/25952.htm (182 words)

	Ústí n. Labem (Site not responding. Last check: 2007-10-21)
		On a left side of lower part are in to caverns chiefly Fluorapophylite and yellowish Natrolite.
		Centre parts are rich on a red, orange and pink Natrolite with Apophylite.
		The Natrolite create here chiefly semispheric aggregacions with very short needles and sporadic fruticose adhesions.
	web.quick.cz /barbuchax/ul1.html (226 words)

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