| The fluorite tends to occur only as cubes modified by the dodecahedron, with simple cubes or octahedra uncommon or absent. |
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| Before that, fluorite encountered in mining was considered waste and used as backfill or dumped. |
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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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| We looked at outcrops by the open pit and saw vugs everywhere with remnants of fluorite and barite crystals. |
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| The fluorite is typically a gangue mineral and is only locally recovered as an ore. |
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| There were shops full of green and purple fluorite, ferberite and arsenopyrite, and spessartine and stibnite. |
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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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| Large anhedral masses of yttrian fluorite, measuring to several feet across, were found at the White Cloud pegmatite. |
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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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| Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine. |
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| Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite. |
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| Also associated with smoky quartz are microcline, fluorite, goethite, and topaz. |
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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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| Older collections sometimes contain small, very pale, transparent green fluorite octahedra from the Tomboy vein. |
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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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| 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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| Overgrowths of fine-grained, bronze-colored siderite are often present on selected faces of the fluorite crystals. |
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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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| 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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| The Boltsburn mine is best known for its large, gemmy fluorite crystals, which are typically penetration twins. |
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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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| White quartz frequently coats the fluorite crystals and can be removed with hydrofluoric acid. |
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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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| In 1990 bright emerald-green, transparent, octahedral fluorite crystals were discovered in the Kettle mine by mine surveyor Michelle Scott. |
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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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| 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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| Examples include at least some colored specimens of quartz, topaz, and fluorite. |
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| Other materials used as fluxes are silica, dolomite, lime, borax, 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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| 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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| 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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| Because of its low index of refraction and low dispersion, clear colourless fluorite of optical quality is used for apochromatic lenses. |
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| Blue hexagonal beryl crystals and colorless, pale green, or blue topaz are found in cavities associated with microcline, smoky quartz, tourmaline, and, rarely, fluorite. |
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| Allanite, fluorite, perovskite, sphene, and zircon have the potential to be future sources of rare earths. |
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| Some minerals that may exhibit fluorescence are fluorite, scheelite, calcite, scapolite, willemite, and autunite. |
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| It is associated mainly with pectolite, albite, arfvedsonite, calcite, fluorite, and apophyllite. |
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| In fluorite, calcium cations are positioned at the corners and face centres of cubic unit cells. |
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| The city is still renowned for its silver, but copper, zinc, lead, and fluorite are also mined in the vicinity. |
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| Very beautifully worked magic wand from rose wood with fluorite on its point and a rock crystal ball at the other point. |
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| Rocksalt, sylvine and fluorite can all be produced artificially. |
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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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| 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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| 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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| There were smoky quartz crystals plus huge fluorite octahedra. |
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| Furthermore, since NMS has been active in the fluorite market, a sector in which trade exists between Member States, the criterion of effect on intra-Community trade is also fulfilled. |
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| Though fluorite and spinel can also occur in a deep violet, and you will sometimes find sapphire and tourmaline in purple, amethyst is the only gemstone whose primary color is violet. |
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| Accessory minerals are represented by apatite, zoisite, sphene, calcite, fluorite and magnetite. |
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| At Stava, Italy, in 1985, a fluorite tailings dam failed and released 200,000 m³ of inert tailings, killing 268 people and destroying 62 buildings. |
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| Place of study by many geologists, the San Calogero is often cited for the characteristics of Poggio Balate where streams emerge from the rocks of hydrothermal fluorite mineral that very special. |
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| Schlieren consists of biotite, amphibole, zircon, allanite, monazite, magnetite, and fluorite. |
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| The cube is by far the most recognized habit of fluorite followed by the octahedron which is believed to form at higher temperatures than the cube. |
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| He added that the program will also double check the results of the previous drilling program which located the fluorite deposit. |
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| Four bezels in the shape of fleurons known as gharnati or roses of Rhodes set with two green fluorite stones and two garnets emanate from an oval medallion studded with a green fluorite stone. |
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| A large amount of synthetic cryolite is made from fluorite. |
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| Gangue minerals include quartz, calcite, adularia, minor fluorite, and trace amounts of pyrite, marcasite, and chalcopyrite. |
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| Klappibacken is an intrusive-related uranium deposit, hosted by a brecciated or cataclastic granite which is strongly enriched in fluorite. |
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| Typical accessory minerals include apatite, zircon, fluorite, magnetite, titanite, and allanite. |
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| Small amounts of fluorite, celestite, howlite have also been found at Cheverie. |
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| Other products being mined or being studied are mercury, tin, copper, lead, sand, fluorite, feldspar, lime, kaolin, and more. |
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| The proceeds were used for the completion of the acquisition of several fluorite mines and processing plants as well as necessary infrastructure upgrades. |
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| KlEnppibEncken is an intrusive-related uranium deposit, hosted by brecciated and cataclastic granite which is strongly enriched in fluorite or hematite. |
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| One SLD and two FLD glass elements, which are comparable in optical performance to fluorite glass, provide maximum correction of chromatic aberrations. |
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