How To Use Fluorite In A Sentence
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The fluorite tends to occur only as cubes modified by the dodecahedron, with simple cubes or octahedra uncommon or absent.
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Crystals of calcium fluoride (CaF2), also known as fluorite and fluorspar, are used to make lenses to focus infrared light.
CreationWiki - Recent changes [en]
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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The only known igneous rocks in the area are Permian periodotite and lamprophyre dikes as well as diatremes of ultramafic composition associated with the Fluorite district.
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In contrast with the well-known, somewhat similar mine at Panasqueira, Portugal, it is remarkable that at Yaogangxian fluorite is very common, and apatite is rather rare.
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Most specimens are on a typical brown goethite matrix and may have associated calcite, plattnerite, barite, fluorite, and hemimorphite.
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Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite.
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In the western United States many metalliferous deposits carry large amounts of fluorite, which is treated as a gangue or waste mineral, but which could be profitably extracted if there were local markets.
The Economic Aspect of Geology
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The Yaogangxian mine is a world-class locality for not only fluorite but also for arsenopyrite, bournonite, stannite, wurtzite, and ferberite.
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One quick stop was made at the abandoned New First of May mine, where on the ore pile we found galena, pyrite, arsenopyrite, and fluorite.
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It has been collected in a road cut near Grant Mills, Cumberland, Rhode Island; in Stratford, Fairfield County, Connecticut; and in greisen with purple fluorite at Irish Creek, Rockbridge County, Virginia.
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She notes that lime-green to purplish-green modified fluorite octahedra have been found at this pegmatite.
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Although relatively simple, this system offers a wide range of minerals to depict (e.g., fluorite, halite, pyrite, and so forth).
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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Fluorite is an important vein mineral in Maoniuping rare - earth deposit in Sichuan Province.
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There were shops full of green and purple fluorite, ferberite and arsenopyrite, and spessartine and stibnite.
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Allanite, fluorite, topaz, yttrotantalite, and zircon have all been found in pegmatites in the Stove Mountain area.
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Also noteworthy are the rare stalactitic overgrowths to 20 cm of pale to medium green fluorite cubes formed along earlier ‘strings’ of whitish finely crystalline quartz.
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Fluorite objectives also have better resolving power than achromats and provide a higher degree of contrast, making them better suited than achromats for color photomicrography in white light.
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The other sides of the plates appear as normal single fluorite cubes, even if slightly rough-surfaced, a feature not uncommon in fluorite crystals from many localities.
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Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite.
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Stalactite-like structures were common in the Black Sheep pocket, forming knobs and fingers of matrix covered with druzy quartz, fluorite, and galena crystals.
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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In one drift there was an ore car from which we could take samples of pale gray, fine-grained rock with traces of disseminated purple fluorite, not very exciting for my son, who wanted to see real gold.
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The ‘L' signifies Canon's top of the line lens series, built with fluorite, ultra-low dispersion and aspherical glass elements.
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The Yaogangxian mine is a world-class locality for not only fluorite but also for arsenopyrite, bournonite, stannite, wurtzite, and ferberite.
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Abundant pale pinkish-reddish to purple to colorless fluorite occurs as granular to monocrystalline masses and rarely as small simple cubes.
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These molds are now lined with crystals of celestine, fluorite, pyrite, strontianite, dolomite, calcite, sphalerite, and barite.
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Examples include at least some colored specimens of quartz, topaz, and fluorite.
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Injected into the granite are veins of quartz with green fluorite, which are the source of the amethyst.
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This covers the tin and fluorite mines of the Bushveld Complex, and there are samples of cassiterite from the Rooiberg mine, fluorite from the Buffalo Fluospar mine, and a smaltite specimen from Buffelsfontein, Groblersdal.
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They collected several pegmatite pockets in which topaz was associated with both clear and smoky quartz, microcline, albite, muscovite, fluorite, and cassiterite.
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This pair of fold away lorgnettes are strung with a dyed coral dragon carving, fluorite beads and small glass beads.
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Fluorspar is the trade name for the mineral fluorite, which is composed of calcium fluoride.
The Economic Aspect of Geology
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The very last fluorite to crystallize left a dusting of microcrystalline snow-white material occupying most of the tight junctures where quartz crystals come together.
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This mine, just north of the Mount Tolman porphyry molybdenum-copper deposit, was once Washington State's sole fluorite producer, with 235 tons shipped between 1918 and 1940.
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There were smoky quartz crystals plus huge fluorite octahedra.
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The fluorite tumbled to the left, rolled toward me, spun on blank slate and rolled toward Johnny.
Arcane Circle
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In 1990 bright emerald-green, transparent, octahedral fluorite crystals were discovered in the Kettle mine by mine surveyor Michelle Scott.
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Fluorite was not an economic commodity until the advent of modern steel-making processes during the late nineteenth century created a demand for it as a fluxing agent.
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Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine.
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Older collections sometimes contain small, very pale, transparent green fluorite octahedra from the Tomboy vein.
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After unsuccessful attempts to obtain leases on properties in both Caldbeck Fells and Alston Moor, the partnership obtained permission to explore a previously unworked fluorite-containing vein in the Rogerley quarry in Weardale.
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While writing, I may choose a clear Quartz Crystal for clarity or a yellow Fluorite octahedron to help keep creative thoughts flowing.
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On the dumps I found galena, pyrite, and rugs full of quartz, dolomite, and a few tiny, water-clear fluorites.
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To understand the running condition of defluoridation projects and fluorite concentration in drinking - water in Zhangjiakou City.
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Examples from fluorite mining in the Upper Pfalz region of Germany (until 1988) show that even under conditions of extremely high labor costs, as found in German mechanized mining, hand picking plays an important role.
Chapter 20
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The new FCT triplets also utilize multi - coated fluorite objectives for maximum light transmission.
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The Boltsburn mine is best known for its large, gemmy fluorite crystals, which are typically penetration twins.
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Amber, fluorite and chrysolite are recommended.
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They collected several pegmatite pockets in which topaz was associated with both clear and smoky quartz, microcline, albite, muscovite, fluorite, and cassiterite.
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This Eagle mine is well known for dark spruce-green, rough-surfaced octahedra of fluorite associated with rhombohedra of rhodochrosite to 0.75 inch on edge.
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There were shops full of green and purple fluorite, ferberite and arsenopyrite, and spessartine and stibnite.
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But when the little fluorite spun halfway around, I knew this was a sign to reverse the rune and change the meaning to trickery and lies.
Arcane Circle
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I passed Johnny a fluorite stone and proceeded to cast a circle around us.
Arcane Circle
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Overgrowths of fine-grained, bronze-colored siderite are often present on selected faces of the fluorite crystals.
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Later in the week we enticed the government guys to take us to a locality called Kent, quite a drive from Karaganda, where in a beautiful setting we collected fluorite, riebeckite, and zircon from granite.
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Feldspar has been hydrothermally altered by a fluorine-rich water vapor to quartz, mica (usually lithian), topaz and/or tourmaline with fluorite, cassiterite, molybdenite, rutile, and wolframite as typical accessory minerals.
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The one notable exception to this is the Boltsburn mine, which produced twinned fluorite crystals of good clarity in excess of 10 cm on edge.
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They collected several pegmatite pockets in which topaz was associated with both clear and smoky quartz, microcline, albite, muscovite, fluorite, and cassiterite.
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Of particular interest are superb specimens of lustrous, pale lavender fluorite crystals, many of which are associated with sphalerite and siderite from what remained of the flats surrounding the Diana vein.
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The fluorite tends to occur only as cubes modified by the dodecahedron, with simple cubes or octahedra uncommon or absent.
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The minerals in my set include fluorite, a very pretty piece of sodalite, and a nice piece of polished tiger eye.
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Then, because the fluorite crystals that are defined by dark color zoning are wedge shaped and depart from parallelism with pyrite crystals by varying degrees, I concluded that epitaxy did not appear possible.
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There were shops full of green and purple fluorite, ferberite and arsenopyrite, and spessartine and stibnite.
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Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine.
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The Henderson mine also contains sharp octahedra of pale grass-green fluorite to 1.25 inches on edge, but generally much smaller, that are commonly associated with pale pink rhodochrosite rhombohedra to about 0.25 inch.
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A greisen is a quartz - mica aggregate containing significant amounts of cassiterite, wolframite, fluorite, topaz, rutile, and tourmaline.
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The Northern Pennine orefield has been an important source of lead, fluorspar (commercial fluorite), and other metallic and nonmetallic ores for many centuries.
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When the fluorite rolled back to Ansuz, then tumbled across the slate as if it were running away and stopped abruptly on Nauthiz, however, my confidence returned; there was a purpose in this reading.
Arcane Circle
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In addition to quartz, fluid inclusions can occur in carbonates, gypsum, halite, fluorite, feldspar, garnet, pyroxene, amphibole, tourmaline, olivine, and sphalerite; indeed in most minerals except phyllosilicates.
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After the coarse calcite was replaced by fluorite, the titaniferous magnetite rims remain as partly martitized magnetite rims around the fluorite ore pods.
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They reopened the mine, hoping to find fluorite that had been left behind - either in place or as backfill by previous lead-mining operations.
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The area has been a prolific source of smoky quartz, amazonite, occasional topaz, and other accessory minerals, including albite, fluorite, phenakite, columbite, cassiterite, goethite, and many others.
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Calcium ferrite can accelerate lime to dissolve so as not to need fluorite fluxing, thus realize steel making without fluorite. Less lining erosion, less environmental pollution.
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Under favorable conditions, sellaite - fluorite type gold deposit will be formed from the solution.
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Before that, fluorite encountered in mining was considered waste and used as backfill or dumped.
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We looked at outcrops by the open pit and saw vugs everywhere with remnants of fluorite and barite crystals.
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Elder Son's Sweet Fiance, wears the purple fluorite, which is very pretty.
The Anchoress
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Fluorite is found as purple or green crystals to 5 mm on edge and as anhedral masses in magnetite/hematite.
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Dunham noted that fluorite was more common in stopes developed on veins lower down in the Melmerby Scar Limestone than in the upper flats.
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Large anhedral masses of yttrian fluorite, measuring to several feet across, were found at the White Cloud pegmatite.
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Also associated with smoky quartz are microcline, fluorite, goethite (some as ‘onegite’), and topaz.
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The area has been a prolific source of smoky quartz, amazonite, occasional topaz, and other accessory minerals, including albite, fluorite, phenakite, columbite, cassiterite, goethite, and many others.
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Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite.
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The fluorite is typically a gangue mineral and is only locally recovered as an ore.
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Fluorite-quartz intergrowths fill veins that follow high-angle en echelon joints and minor faults in granite.
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Directing my awareness onto the fluorite resting on the pentacle, my first few questions would be easy, to set the tone.
Arcane Circle
