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Topic: Datolite

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	Datolite - LoveToKnow 1911
		The crystals were for a long time considered to be orthorhombic, and indeed they approach closely to this system in habit, interfacial angles and optical orientation; humboldtite was the name given by A. Levy in 1823 to monoclinic crystals supposed to be distinct from datolite, but the two were afterwards proved to be identical.
		Datolite is white or colourless, often with a greenish tinge; it is transparent or opaque.
		Large crystals of datolite completely altered to chalcedony were formerly found with magnetite in the Haytor iron mine on Dartmoor in Devonshire;; to these pseudomorphs the name haytorite has been applied.
	www.1911encyclopedia.org /Datolite (283 words)

	Datolite
		Datolite is one of the pneumatolytic minerals found in the Parker shaft at Franklin.
		In 1926 the variety of datolite called botryolite was found at Franklin in the form of a fibrous crust with a botryoidal surface that coats axinite and rhodonite, and also cahnite in some of the veins in which that mineral was first found.
		The datolite is snow-white and appears to be contemporaneous with the cahnite.
	franklin-sterlinghill.com /palache/datolite.stm (616 words)

	DATOLITE Chapter15. Nesosilicates
		Datolite, a calcium boron silicate hydroxide mineral, was first described by Penfield and Foote (1897) from the Parker Mine, but it is not known from Sterling Hill.
		Datolite occurs as fine, colorless, euhedral crystals to several cm in vuggy, recrystallized assemblages.
		Datolite commonly lines vugs in recrystallized assemblages and seams and occurs as druse botryoidal coatings on rhodonite, manganaxinite, and cahnite.
	franklin-sterlinghill.com /dunn/ch15/datolite.stm (265 words)

	Thaigem.com \| Info Center \| A-Z Gemstones \| From Gemology To Mythology Learn More About Datolite At Our A-Z Gemstones
		The name Datolite is derived from the Greek “Dateisthai” meaning “To Divide”, in reference to the relative ease of breaking apart the raw mineral.
		Datolite is formed from Calcium Boron Silicate Hydroxide and is white, colorless, yellowish, brown, green and (rarely) orange, reddish or gray.
		Datolite occurs as discrete, vitreous crystals and as massive nodules.
	www.thaigem.com /infocenter/buyer_guides/a-z_gemstones/datolite.asp (247 words)

	Thaigem.com \| Info Center \| Gemstone Discovery \| Datolite
		Datolite is quite a popular mineral among collectors.
		Datolite occurs in two distinct forms: as discrete, vitreous crystals and as massive nodules.
		Datolite is rarely found as a facetted gem.
	www.thaigem.com /dis_datolite.asp (286 words)

	News from the Keweenaw: part 2: recent mineral finds in Michigan's Copper Country: seventh in a series of articles on ...
		Datolite nodules to 8 cm in diameter were recovered from this zone; they have a whitish-brown chalky rind, making them easy to spot in the water.
		Closer to shore, and in only 10 feet of water, datolite nodules were discovered in August 2001 in a fissure vein that trends S. 75[degrees] E. and consists of quartz, calcite, and laumontite.
		The color of most of the datolite from this vein is a dark red to maroon-brown, quite different from that in the zone previously described.
	www.findarticles.com /p/articles/mi_m0GDX/is_6_77/ai_93973951 (951 words)

	Keweenaw Michigan field trip
		The datolite is found as nodules of massive, finely crystalline, material.
		The nodules usually do not show any datolite on the surface and are recognizable primarily due to the surface texture of the nodules (they look like the surface of cauliflower).
		The porcelain habit of datolite is also found as a vein filling material, but is difficult to recognize on the mine dumps.
	www.minsocam.org /MSA/collectors_corner/vft/mi4c.htm (566 words)

	Datolite - Wikipedia, the free encyclopedia
		Datolite crystallizes in the monoclinic system forming prismatic crystals and nodular masses.
		The luster is vitreous and may be brown, yellow, light green or colorless.
		Unlike most localities throughout the world, the occurrence of datolite in the Lake Superior region is usually fine grained in texture and possesses colored banding.
	en.wikipedia.org /wiki/Datolite (197 words)

	The occurrence of porcelaneous datolite in Michigan's Lake Superior Copper District: part 2: Southern Keweenaw, ... (Site not responding. Last check: 2007-10-03)
		Porcelaneous and crystallized datolite has been found sparingly in all of the major amygdaloidal copper lodes mined in the central zone but does not occur in the conglomerate lodes.
		The datolite is typically fine grained and translucent to opaque; colors range from white to butterscotch and from peach to orange to red.
		This datolite conforms to the outline of the vesicles, and the rim or rinds of the masses are semismooth and usually coated with a dark green to fl chloritic mineral.
	www.findarticles.com /p/articles/mi_m0GDX/is_3_80/ai_n13676526 (1074 words)

	DATOLITE (Calcium Boron Silicate Hydroxide)
		Datolite is a popular mineral among mineral collectors although it is somewhat obscure.
		Datolite's crystals although usually well formed and strickingly faceted lack any symmetry elements except for one mirror plane and one axis of two fold rotation.
		Datolite is also found in the Lake Superior region of Michigan.
	mineral.galleries.com /minerals/silicate/datolite/datolite.htm (241 words)

	Dwarves' Earth Treasures by Jeffrey Anderson
		Many opaque datolite nodules tend to look big greenish which is due to absorbance of all colors but green from any sources of light, as if green light was cast away as "unwanted item".
		The true green colors of datolites got their colors from paratacamite, a micro-mineral that were formed by reactions between native copper inclusions and ancient salt brines.
		This datolite has an ususual fl rim where dark inclusions are concentrated by the growth of datolite itself.
	www.sailorenergy.net /Minerals/MLDatolites/MineralsDatoliteHowtheygotcolors01.html (741 words)

	GemRocks: Datolite
		Datolite polished slices (match gives scale) from Keweenaw Peninsula, Michigan.
		Sugar stone - name sometimes applied to a pink datolite from the Keweenaw Peninsula of Michigan's Upper Peninsula that has a slightly coarser "sugarlike" texture than that of the typical nodules.
		I suspect this relates to her coming from Michigan's Upper Peninsula, where her father was a copper miner and musician.
	www.cst.cmich.edu /users/dietr1rv/datolite.htm (763 words)

	Astrology & Gemstones, Birthstones: Datolite Gemstone - Gems shop online
		The name is derived from the Greek 'Dateisthai', which means "To Divide" referring to the fact that the mineral crumbles quite easily.
		Datolite occurs in two distinct forms: as discrete crystals and as massive nodules.
		Datolite is often found in basalt vesicles with calcite and zeolites.
	www.findyourfate.com /gemology/gemstones/Datolite.html (111 words)

	Barf
		The datolite crystals were incredibly lustrous, pale green, to 1 inch in size.
		One large boulder sported a calcite and datolite vug, but was clearly too large to carry out.
		This head-sized specimen thus shows datolite on one side, and calcite and quartz on the opposite side, and is thus rotated every so often on my desk.
	home.comcast.net /~paugilmo/Barf.html (942 words)

	September 2001
		Datolite is a hydrated calcium borosilicate containing equal amounts of boron and silicon.
		The reports of datolite in the Slate Range and in the Calico Mountains are too vague to be useful and are not confirmed.
		A little datolite up to 2 millimeters was found with rosenhannite in about ten boulders in the Russian River in Mendicino County but could not be traced to the source.
	www.mineralsocal.org /bulletin/2001/2001_sep.htm (2529 words)

	datolite (Site not responding. Last check: 2007-10-03)
		Datolite from the #2 Sovetsky mine, Dal'Negorsk, Primorskiy Iray, Russia.
		The datolite is over a fl matrix, possibly ilvite.
		Light green datolite crystals with small ilvaite crystals scattered on several faces, there are small datolite crystals on top of the ilvaite crystals.
	www.earth-energy.com /DATOLITE1.html (252 words)

	USGS Spectroscopy Lab - Clark et. al. 2003 Spectral Library splib05a
		)(OH): Datolite is typical of a mineral of secondary origin found in cavities in basaltic lavas and similar rocks.
		However, in datolite the intense 1.9 µ feature, indicative of the presence of molecular water is completely absent, and yet the spectrum of gypsum is explained entirely in terms of its molecular water of crystallization, with the 1.7 µ feature involving librational modes of water.
		It would seem therefore, in the absence of water that the bands short of 1.85 µ in datolite must be due to combination modes of at least two different types of OH stretching vibrations.
	pubs.usgs.gov /of/2003/ofr-03-395/DESCRIPT/M/datolite_hs442.html (277 words)

	DATOLITE - Online Information article about DATOLITE
		monoclinic crystals supposed to be distinct from datolite, but the two were afterwards proved to be identical.
		The mineral also occurs as masses with a granular to compact texture; when compact the fractured surfaces have the See also:
		Datolite is a mineral of secondary origin, and in its mode of occurrence it resembles the See also:
	encyclopedia.jrank.org /DAH_DEM/DATOLITE.html (535 words)

	Worldwide $100 - up
		There was a great find of these excellent datolites several years ago by a couple of local collectors who re-worked the pile for specimens.
		There used to be thousands of these unique porcelanous datolites on the market but in recent years they have been less and less available for purchase.
		Polished datolite nodule with a creamy white color and subtle highlights of greenish/grays along the rim.
	www.northstarminerals.com /gallery2.htm (6397 words)

	Datolite (Site not responding. Last check: 2007-10-03)
		Datolite is also coarse to fine granular and found in compact masses.
		LUSTER Datolite has a vitreous luster but is dull in the massive varieties.
		OCCURRENCE Datolite is a secondary mineral usually found in silica poor igneous rocks.
	www.gc.maricopa.edu /earthsci/imagearchive/datolite.htm (98 words)

	Datolite and Prehnite
		Datolite is a rare mineral ocurring in cavities in basaltic lavas, often in association with Zeolites.
		It may be confused with minerals like Prehnite, but the characteristic porcelain-like appearance is unmistakable and readily helps identification.
		Whereas the Prehnite crystals have smooth, angled faces, the Datolite is more rounded and the surface of the crystals has a rather attractive frosting.
	www.wildaboutrocks.com /prod2432.htm (98 words)

	Datolite
		Minerale, silicato di calcio e...; - Datolite in the AE Seaman Mineral Museum.
		Datolite from the Mesnard Mine, Houghton County, Michigan...; Datolite con calcite e aragonite - Madonna del Lago (Eita- Val Grosina)...
		Datolite: Datolite mineral data from mindatorg mineralogy database.
	xoomer.alice.it /bzapohuisa/images07/jxerapato (214 words)

	Billy Bob's Page About Lacamas Creek, WA. (Site not responding. Last check: 2007-10-03)
		We have found doubly terminated stilbite crystals in clusters over two inches long with small datolite sprinkled over them; also heulandite, calcite, copper, and laumontite.
		It was associated with datolite, calcite, laumontite, and the copper in all three of the large pockets but not in any of the small pockets.
		DATOLITE- an uncommon mineral in the northwest, datolite up to 8mm across was found on the stilbite crystals from all three pockets, and on the matrix in the second pocket.
	members.tripod.com /~WTompkins/index-3.html (1312 words)

	September 2004
		In any case, I recently was able to obtain a large enough clean sample of ball material to obtain an x-ray powder diffraction pattern with the equipment that I have available.
		Surface of one of the datolite balls shown in figure 1.
		Thus altogether datolite at Boron at least occurs with natrolite, analcime, clinoptilolite-Na, colemanite, ulexite, and calcite.
	www.mineralsocal.org /bulletin/2004/2004_sept.htm (1991 words)

	DATOLITE from Italy (Site not responding. Last check: 2007-10-03)
		BOCCASSUOLO, MODENA - Datolite is a typical mineral of the Appennini mountains.
		The vulcanic origins of this mineral are well known and this mineral fills quite often the many cavities formed inside the so called "green rocks" of the ophiolites.
		BOCCASSUOLO, MODENA - A cluster of 0.4-0.8 cm datolite crystals show up on this rock.
	www.italianminerals.com /ITALY/datolite.html (55 words)

	Mineral Specimen for sale of Datolite on Quartz epimorph after Anhydrite lined with Heulandite from Upper New Street ... (Site not responding. Last check: 2007-10-03)
		Mineral Specimen for sale of Datolite on Quartz epimorph after Anhydrite lined with Heulandite from Upper New Street Quarry, Paterson, Passaic County, New Jersey.
		Datolite on Quartz epimorph after Anhydrite lined with Heulandite from Upper New Street Quarry, Paterson, Passaic County, New Jersey.
		This mineral specimen of Datolite on Quartz epimorph after Anhydrite lined with Heulandite from Upper New Street Quarry, Paterson, Passaic County, New Jersey is available for sale from John Betts - Fine Minerals, mineral dealer located in New York City, New York.
	www.johnbetts-fineminerals.com /jhbnyc/gifs/35145.htm (237 words)

	Mineral Specimen for sale of Datolite from First Sovietskiy Mine, Dalnegorsk, Primorskiy Kray, Russia. (Site not responding. Last check: 2007-10-03)
		Datolite from First Sovietskiy Mine, Dalnegorsk, Primorskiy Kray, Russia.
		This mineral specimen of Datolite from First Sovietskiy Mine, Dalnegorsk, Primorskiy Kray, Russia is available for sale from John Betts - Fine Minerals, mineral dealer located in New York City, New York.
		The datolite crystals are translucent, lustrous with distinct crystals.
	www.johnbetts-fineminerals.com /jhbnyc/gifs/35415.htm (193 words)

	Datolite Mineral Data
		From the Greek, dateisthai, meaning "to divide," because granular aggregates crumble readily.
		Comments: Cluster of doubly-terminated datolite crystals to 3.3 cm across with a scattering of brown inclusions.
		Warning: this large pop-up is very compute intensive and may not work well with some computers.
	webmineral.com /data/Datolite.shtml (248 words)

	Datolite (Site not responding. Last check: 2007-10-03)
		Mineral Notes: Datolite forms complex crystals which can appear as isometric dodecahedra or trapezohedra.
		However Datolite crystals, although usually well formed and faceted, lack any symmetry elements except for one mirror plane and one axis of two fold rotation.
		Description: A thin matrix upon which sits a thick covering of very attractive Datolite crystals.
	www.wildaboutrocks.com /prod2500.htm (116 words)

	The Keweenaw Agate Shop (Site not responding. Last check: 2007-10-03)
		Minerals that may be found on you rock hounding expeditions are; Microclines, Chlorites, Epidote, Pumpellyite, Prehnite, Copper, Quartz, and Calcites as the most abundant groups in the area.
		The area is also known for Datolite that occurs in two distinct forms: as discrete, vitreous crystals and as porcelaneous nodules.
		This Datolite has a cauliflower-like surface and ranges in color from white to gray, brown, red, orange, yellow and various pastel shades including green and is valued by collectors for its beauty as a lapidary material.
	www.copperharbor.org /site_files/kew_agate.html (717 words)

	Dwarves' Earth Treasures by Jeffrey Anderson
		Datolite almost always come in the form of crystals, and there is only one place in the world where the datolites come in form of porcelianlike solid nodules; the copper ore regions of the Upper Peninsula of Michigan.
		Such datolite nodules are commonly white, but some of them come in a variety of colors that make them even rarer and more desirable.
		I also would greatly appreciate any information on where to find datolites (like where is the mines of Superior, Nassau, Star, Bumblebee, datolite fissures, etc.).
	www.sailorenergy.net /Minerals/MLDatolites/MineralMainDatolitesMI.html (180 words)

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