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fluorite
fluorite
fluorite (fluorspar, Blue John) Mineral, CaF
2;sp. gr. 3.2;
hardness 4;
cubic; often yellow, green, blue, or purple, but can be colourless, pink, red, or black, and often colour banded; white
streak; vitreous
lustre;
crystals often cubes, but can be
octahedra and
rhombdodecahedra, and a mixture of forms;
cleavage perfect {111}; widely distributed in mineral veins alone or as a
gangue mineral with metallic ores, and in association with
quartz,
barite,
calcite,
galena,
cassiterite,
sphalerite, and many other minerals; soluble in sulphuric acid with the evolution of hydrogen sulphide. It is used extensively as a flux in the smelting of iron, in the ceramic industry, and in the chemical industry. The deep-purple, banded variety, Blue John, is used as an ornamental stone.
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Chinese fluorite.(mining industry)
Magazine article from: The Mineralogical Record; 1/1/2005; ; 700+ words
; ...in fine specimens since about 1990, fluorite has thus far been the most abundant and...but the fact remains that some Chinese fluorite localities are of world-class importance...the informational gap regarding Chinese fluorite, now commonly offered on the market...
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Fluorite: The Collector's Choice.(Book review)
Magazine article from: The Mineralogical Record; 5/1/2007; ; 700+ words
; Fluorite: The Collector's Choice Edited by Jesse...Price $30.00. [ILLUSTRATION OMITTED] Fluorite: The Collector's Choice has what is...offering short chapters on an eclectic mix of fluorite-related topics dispersed apparently...
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Serious wastage of fluorite resource in China.(Inorganics)
Magazine article from: China Chemical Reporter; 8/6/2009; 700+ words
; The status of fluorite resource Following after South Africa and Mexico, the proved reserves for fluorite resource in China rank the 3rd worldwide...total. However, China's output of fluorite takes the lead worldwide and covers half...
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CHINA'S FLUORITE EXPECTED TO DOMINATE WORLD MARKET
News Wire article from: AsiaInfo Services; 5/29/2003; 490 words
; 00-00-0000 China's Fluorite Expected to Dominate World Market BEIJING...2003 (SinoCast via COMTEX) -- China's fluorite has an important position in the world market. China's fluorite production accounts for around 50 of the...
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Magmatic vs. hydrothermal origin of fluorites from Vlastejovice, Bohemian Massif
Magazine article from: Journal of the Czech Geological Society; 1/1/2005; ; 700+ words
; ...strong HREE depletion in fluorites from contact zones in...The HREE contents in fluorite from contact zones are...Minimal temperature of fluorite crystallization can...we can assume, that fluorites probably formed during...conditions. Key words: fluorite; pegmatites; skarn...
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Consumption prospect and market analysis of fluorite.(Market Report)
Magazine article from: China Chemical Reporter; 4/6/2004; 700+ words
; China has the greatest reserves of fluorite in the world and both the output and...fluorine-containing fine chemicals, fluorite has already become an extremely important...in the world. The proven reserves of fluorite in China account for one third of the...
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Hemispheroidal fluorites from India.(Report)
Magazine article from: Rocks & Minerals; 7/1/2008; ; 700+ words
; ...recently, nearly unique fluorite specimens. These are...yellow to honey-colored fluorites. I believe that I was...the time that it was fluorite; the dealer sold it...common feature of the fluorite from Ajanta (fig...gray, kidney-shaped fluorites have also been found...
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Pilot-scale study of fluorite beneficiation using a cyclonic static microbubble flotation column
Magazine article from: Minerals & Metallurgical Processing; 11/1/2007; ; 700+ words
; ...column (FCSMC) was investigated for fluorite beneficiation. The structure and principle...specially designed column are described. Fluorite samples from the tungsten separation...flotation test unit, and concentrates with a fluorite grade higher than 98% were obtained...
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The odd fluorite crystal points: from the Elmwood mine, Smith County, Tennessee.
Magazine article from: Rocks & Minerals; 1/1/2009; ; 700+ words
; ...explanation. Take, for example, the pointed fluorite crystal parts from the Elmwood zinc mine...of most of what were once much larger fluorite crystals. Few would argue with this...throughout, so much so that many very large fluorite gems have been cut from them (fig...
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The Vergenoeg fluorite mine: Gauteng Province, South Africa.
Magazine article from: Rocks & Minerals; 9/1/2008; ; 700+ words
; ...OMITTED] [FIGURE 4 OMITTED] The Vergenoeg fluorite mine is located in the Gauteng Province...an anomaly regarding the production of fluorite mineral specimens--it is located on the largest fluorite deposit on Earth, yet it is virtually...
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fluorite
Book article from: A Dictionary of Astronomy
fluorite Calcium fluoride crystal, used as an optical material. Objective lenses made from fluorite are particularly free from chromatic aberration, since fluorite has approximately half the dispersion of crown glass...
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fluorine
Book article from: The Columbia Encyclopedia, Sixth Edition
...potassium hydrogen fluoride. The mineral fluorite , or fluorspar (calcium fluoride...fluorine lies largely in its compounds. Fluorite is used as a flux in refining iron...antisoil properties to textiles. The use of fluorite as a flux was described in 1529 by Georgius...
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chinastone
Book article from: A Dictionary of Earth Sciences
...PLAGIOCLASE FELDSPAR ), and minor muscovite , topaz , and fluorite . The rock is essentially a granite which is in an arrested...strong kaolinization, can be veined by secondary quartz and fluorite, both products of the kaolinization process. Superb examples...
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Minerals
Encyclopedia entry from: UXL Encyclopedia of Science
...hardness 2) and talc (hardness 1), but it cannot scratch fluorite (hardness 4). Color and streak. Although some minerals...scraped across an unglazed porcelain tile called a streak plate. Fluorite, for example, comes in a great range of colors, yet its...
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cleavage in minerals
Book article from: The Oxford Companion to the Earth
...depends on the symmetry of the structure. The cleavage may consist of either one form or set of planes (as, for example, in fluorite (4 planes, octahedral), galena (3, cubic), andalusite (2, prismatic), gypsum (1, pinacoidal), or there may...
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