How To Use Calcite In A Sentence
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The mix we use contains compost, peat, perlite, rock phosphates, blood meal, calcite clay and gypsum.
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Calcite and ankerite are present, but the most abundant carbonate is magnesite.
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A preliminary review of the local mineralogy was subsequently written by Endlich, who noted the presence of aragonite, chabazite, calcite, mesolite, and natrolite, in addition to ‘leucite.’
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Cuprite occurred along with chalcocite as inclusions in small calcite crystals.
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Calcite splits incoming rays of light in two, known as birefringence.
Sunstones could have helped Vikings navigate from Norway to America
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Reinvestigation of dioptase-plancheite pseudomorphs after calcite from the Tantara copper deposit Katanga, Republique du Congo.
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The way on is a traverse round a mud bank to the left, which climbs into a passage above the calcite floor.
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The calcite typically occurs as colorless to white discoidal crystals about 4 cm across; however, individual crystals to 30 cm are known.
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Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments.
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Most such specimens are partially coated with a druse of calcite, epidote, and small, clear needle quartz crystals.
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Although the quartz encrustation protects the calcite from dissolving, it obscures the twinned nature of the crystals, which is revealed by mechanical removal of the crust.
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The minerals are deposited in lakes, deltas and meander further downstream, where they build up and form sedimentary rocks such as calcite, selenite, pyrite and dolomite.
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The walls of the cave were clean white limestone and decorated with pretty cave flowers and calcite crystals.
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Galena is also found as larger isolated octahedral crystals within the coarse calcite cement in breccias in the upper parts of the core.
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The dyke forms a ridge, as a result of a pervasive calcite cement.
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These crystals are associated with chalcopyrite, galena, quartz, calcite, epidote, and chlorite.
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The calcspar is extremely abundant at Bergen Hill, where it might be mistaken for many of the other minerals which I describe as occurring there, and even in preference to them, to one's great chagrin upon arriving home and testing it, to find that it is nothing but calcite.
Scientific American Supplement, No. 344, August 5, 1882
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Limited dolomitization of the calcite around the edges of the fossils and in the matrix of the concretion occurred at a later stage.
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Analcime may also be associated with quartz crystals, calcite, and common opal.
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Both samples consist of fine-grained calcite with elongated or equant shapes.
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The detailed sequence of morphological changes of calcite crystals possibly provides a record of the elevation of the saline transition zone, with which hydrogeological models must be consistent.
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The main gangue minerals that make up the vein are massive white calcite, quartz, and prehnite.
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Dolomite is stained purple, calcite is unstained in the alkaline solution.
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The next three cases (43-45) are chiefly devoted to the various crystallisations of calcite, including that generally known as the Fontainbleau crystallised sandstone, and the stalactic and fibrous varieties from Africa, Sweden, and Cumberland; while the two cases marked 45 A and B are covered with polished samples, known to people generally as marbles, including the beautiful fire marble.
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It is dominated by the deposition of calcite with minor pyrite, marcasite, barite, anhydrite and gypsum.
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Barite, sphalerite, and calcite are the most abundant vein minerals; pyrite, kaolinite, chalcopyrite, galena, and wurtzite are less common.
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The stone lets out a chemical called calcite which means that the building stays white even when exposed to the elements.
EzineArticles
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The mix we use contains compost, peat, perlite, rock phosphates, blood meal, calcite clay and gypsum.
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The limestone is highly fractured and contains abundant calcite and quartz veins.
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The Sacral chakra, on top of the pelvis, matches the color orange, as in crystals such as carnelian, sunstone or calcite.
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Good specimens of sperrylite with apophyllite, prehnite, thaumasite, and calcite are reported.
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The concretion matrix is dominantly an interlocking mosaic of calcite, ferroan dolomite and quartz.
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Here, too, the veins may be monomineralic, commonly quartz or calcite, but more usually are polymineralic with a mixture of metalliferous sulphide or oxide minerals and gangue minerals.
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Another form of calcite which is to be sparingly found is what is called dogtooth spar, having the form shown in Fig. 4.
Scientific American Supplement, No. 344, August 5, 1882
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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 calcite and other such minerals suffered greatly from exposure to the weather.
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The calcite is an insoluble mineral, which upon death of the organisms sinks to the floor of the body of water and accumulates in the sediment.
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ALABASTER) and other stalagmitic deposits also consist of calcite, and so do the allied deposits of travertine, calc-sinter or calc-tufa.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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The surface luster of many of the calcite crystals is frosted.
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Zeolite veins appear to be later than prehnite veins, and calcite is the last mineral to form veins in the dyke samples.
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Stem, calyx, and arms are all made of calcite plates.
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Access to the pit is prohibited, but excellent specimens of calcite scalenohedra, dolomite rhombohedra, pyrite, and marcasite have been collected from the pit's east wall.
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Here we have used the atomic force microscope to directly observe changes in the atomic lattice on a calcite seed crystal after the introduction of abalone shell proteins.
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Other than clay minerals, calcite and pyrite are the most common secondary minerals present.
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Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments.
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It is rhombohedral in crystallization and isomorphous with calcite and chalybite.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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Priced at Rs 4.34 million ex-showroom Delhi, the company will roll out a total of 192 E-Class cars coloured in carneol red, obsidian black, calcite white, tenorite grey, iridium silver and cubanite silver.
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The calcite precipitates are geochemically analyzed to constrain the nature and origin of the fluids associated with the faulting events and their timing.
Interactive Dig Sagalassos 2003 - Seismological Studies Report 2
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The minerals are deposited in lakes, deltas and meander further downstream, where they build up and form sedimentary rocks such as calcite, selenite, pyrite and dolomite.
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The ancient skeletal fossils are made not of bone, but of calcite, which is the same material that makes up the rock matrix in which they are embedded.
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The sparry calcite is interpreted as a single phase of precipitation that infilled external moulds of the arthropod.
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Vug-filling minerals are barite, calcite, celestine, dolomite, sphalerite, and strontianite.
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Another form of calcite which is to be sparingly found is what is called dogtooth spar, having the form shown in Fig. 4.
Scientific American Supplement, No. 344, August 5, 1882
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Flow margins are often altered, containing abundant epidote and amygdales with quartz, calcite and/or chlorite.
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Associated minerals in the high-grade veins are calcite, ‘smaltite,’ nicoline, bismuth, and lesser pyrargyrite, proustite, acanthite, millerite, and chalcopyrite.
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In the crystallization sequence from hydrothermal solutions, calcite is typically a late and low-temperature crystallizing mineral.
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Many of these calcite crystals and crystal groups are partially or completely covered with an overgrowth of pyrite.
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The nonzeolites apophyllite, calcite, and quartz commonly occur at many localities.
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Further up the core into the Waulsortian sequence, the limestones are cleaner and the breccia clasts are cemented by calcite.
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Iron oxide nodules are commonly septaria, exhibiting networks of thin veins of coarsely granular calcite.
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Common cements include clay minerals such as kaolinite, montmorillonite, or illite; quartz or chalcedony; iron oxides such as haematite; or calcite.
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It is found in association with cerussite, calcite, hemimorphite, aurichalcite, malachite, willemite, and chrysocolla.
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Invisible traces of quartz, calcite, gypsum and feldspar, the dust of its resting place for more than two millennia, cling to the bronze.
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The calcite acts as a mask, obscuring the gold-bearing veins from the predominate ones that contain nothing.
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Vein minerals are ferroan dolomite, barite, calcite, pyrite, and quartz.
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ALABASTER) and other stalagmitic deposits also consist of calcite, and so do the allied deposits of travertine, calc-sinter or calc-tufa.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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Boron occurs in nature as boric acid or sassoline (H_ {3} BO_ {3}); borax or tincal (Na_ {2} B_ {4} O_ {7}. 10H_ {2} O); ulexite or boronatrocalcite
A Text-book of Assaying: For the Use of Those Connected with Mines.
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As seen in the granite, subhedral to anhedral grains of fayalite are fractured and show varying stages of alteration to hematite, antigorite, calcite, and magnetite.
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Some samples have hematite in the calcite veins.
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If possible, we will date calcites reflecting important tectonic activity by means of U-Th and/or U-Pb dating techniques in order to determine a geochronological evolution of the changing stress fields and the absolute timing of important fault activities.
Interactive Dig Sagalassos 2003 - Seismological Studies Report 2
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Some of the dissolved substances of weathering, such as calcite, quartz, and iron oxide, are carried down and deposited in openings of the rocks, where they act as cements.
The Economic Aspect of Geology
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White to yellowish calcite often fills the central part of the agate and must be dissolved away to expose the quartz, which is common, and the barite, which is less common.
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Pseudomorphs of smithsonite after calcite crystals have been reported from this locality.
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Two adjacent geodes from the same piece of shale could be cracked open, and one would be lined with brown calcite, the other with quartz.
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An alternative mechanism involves lithification by magnesium calcite, aragonite, or dolomite brought about by the subsurface mixing of sea water with fresh waters draining from the land.
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Phosphate may also replace calcite or be precipitated instead of calcite in neutral or slightly acidic pH conditions.
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The essential proportion is given by three hectograms of calcite for one kilo of earth.
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In the vein's central vug, ferroaxinite overlies a selvage (fault gouge) of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite.
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The blobs correspond to vacuities in the dentine and are probably due to calcite or some other post-mortem infilling.
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Estroff and graduate student Hanying Li grew samples of calcite in a hydrogel called agarose -- a common dessert additive -- that mimics the way calcite grows in living things.
R&D Mag - News
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The Calcite Mineral Kingdom addresses you today.
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Other important types of minerals include: the carbonates (e.g. calcite, CaCO3) the sulfides (e.g. galena, PbS) and the sulfates (e.g. anhydrite, CaSO4).
AP Environmental Science Chapter 10- Minerals
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The occurrence of low-volatile coal in certain coalfields in India is attributed to the carbonization of coal seams by the intrusion of mica lamprophyre which is a mica-rich ultrabasic rock containing altered olivine, calcite (or dolomite), bronze-coloured mica and apatite.
4.1 Geological investigations
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Most of the arthropods consist of an infill of sparry calcite with uniform luminescence.
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Mineralization consists of quartz-albite-calcite veining with disseminated pyrite, pyrrhotite and arsenopyrite hosted in pervasively silicified, brecciated siltstone and wacke.
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Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite.
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Calcite and barite actually crystallize after the formation of chalcedony and quartz cease and often infill or possibly cause subsequent fracturing of the agate.
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He arrived at this from a study of calcite crystals of various habits and noted that the cleavage rhombohedra were always the same.
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The main minerals identified were mainly calcite also some diopside, wollastonite, iron oxides and a few scattered dolomite crystals.
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Porous, relatively soft, fine-textured and somewhat friable, chalk normally is white and consists almost wholly of calcium carbonate as the common mineral calcite.
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The main minerals identified were mainly calcite also some diopside, wollastonite, iron oxides and a few scattered dolomite crystals.
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There will be azurite, pyromorphite, marvelous twinned calcite, stibnite that rivals that from Japan, stibiconite, scheelite, hematite with lightly tinted quartz, cinnabar, hemimorphite, and a range of other colorful minerals.
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This calcite typically overgrows quartz and crystallizes before heulandite, stilbite, and apophyllite.
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The authors show that early concretion growth prevented collapse and infilling of voids in the organisms, in the time-interval between organic decay and precipitation of calcite.
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Associated minerals were calcite, copper, cuprite, tenorite, and malachite.
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The junction pockets are commonly lined with quartz and calcite upon which zeolites and associated minerals crystallize.
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The greenish-colored vein averages 2-4 feet in width and is composed of epidote, quartz, and calcite.
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The shoots and stalks themselves are casts composed of combinations of chalcedony, quartz, calcite, and barite.
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He further stated that the lithophysae are lined with orthoclase and quartz, and the cavities are partially filled with calcite, quartz, and chlorite.
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The skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet (probably andradite or grossular), and pyrite.
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Additional weak silicic solutions formed thin encrustations of quartz on the calcite in delicate encrustation pseudomorphs.
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Dolomite is stained purple, calcite is unstained in the alkaline solution.
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The purest examples of calcite, however, are transparent, with perfect crystal form and clarity.
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Calcite is one of the frequently occurring minerals in cavities within the basalts of the Deccan trap rocks of Maharashtra State, India.
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The trick to recovering fine specimens is to collect the chunks of rock showing prehnite and calcite.
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They may see colors that are due to other minerals such as calcite, which forms hard pan or caliche in the -- in certain parts of the U.S. and which is deposited, in most cases, by water.
CNN Transcript Jan 15, 2004
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Multiple phases of zoned calcite are common, often truncated by a major dissolution surface overgrown by a late, granular calcite.
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Barium occurs chiefly in the form of barytes or heavy spar, BaSO_4, and witherite, BaCO_3, and to a less extent in baryto-calcite, baryto-celestine, and various complex silicates.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"
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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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In each of these settings, progressive evaporation of seawater leads to precipitation of calcite and gypsum followed by halite.
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At most locations in the Deccan Traps, the primary form for calcite is the rhombohedron.
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Several pockets up to 1.3 meters and containing calcite crystals were exposed in the walls of the stopes.
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The main gangue minerals that make up the vein are massive white calcite, quartz, and prehnite.
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Matrix minerals of the septaria are ferroan dolomite, quartz, calcite, and pyrite.
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Barium occurs chiefly in the form of barytes or heavy spar, BaSO_4, and witherite, BaCO_3, and to a less extent in baryto-calcite, baryto-celestine, and various complex silicates.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"
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Most of the cavities are filled or lined with crystalline formations of various zeolites, such as stilbite, scolecite, and heulandite, plus calcite and apophyllite; these minerals typically occur in combination with each other.
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The limestone is highly fractured and contains abundant calcite and quartz veins.
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Zeolite veins appear to be later than prehnite veins, and calcite is the last mineral to form veins in the dyke samples.
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Vein minerals are barite, calcite, chalcopyrite, galena, pyrite, and sphalerite.
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Abundant thin calcite and quartz veins cut the schists, and have been boudinaged and rotated parallel to the first cleavage.
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This cavity may then be filled with coal, calcite, siderite, or any other form of sediment.
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Other associated minerals include tetrahedrite, calcite, and gypsum.
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The research works by using a naturally forming crystal called calcite which has extraordinary light bending abilities.
Telegraph.co.uk - Telegraph online, Daily Telegraph and Sunday Telegraph
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In all specimens the groundmass is peppered with opaque minerals, rare apatite laths and rare euhedral blade-like calcite.
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A gray, fine-grained arkosic sandstone tablet bearing an inscription in ancient Hebrew from the First Temple Period contains a rich assemblage of particles accumulated in the covering patina that includes calcite, dolomite, quartz and feldspar grains, iron oxides, carbon ash particles, microorganisms, and gold globules (1†"4 μm in diameter).
BiblePlaces Blog
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Some of the highlights are a 220-pound, 500,000-carat golden sapphire, one of the world's largest; a 4,360-carat ‘rainbow’ calcite; and the world's largest tanzanite set in a tiara with one thousand diamonds.
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An opaque calcite of a grass-green colour, occurring as large cleavage masses in central India and known as hislopite, owes its colour to enclosed "green-earth" (glauconite and celadonite).
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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A comparison between all the techniques used to analyse calcite cements reveals subtle differences between injected and depositional sandstones.
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Most such specimens are partially coated with a druse of calcite, epidote, and small, clear needle quartz crystals.
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On a dark night during the fall I was examining the uvarovite and I discovered that there was a crack in the calcite on the side of the uvarovite.
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Boron occurs in nature as boric acid or sassoline (H_ {3} BO_ {3}); borax or tincal (Na_ {2} B_ {4} O_ {7}. 10H_ {2} O); ulexite or boronatrocalcite
A Text-book of Assaying: For the Use of Those Connected with Mines.
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The veins are surrounded by a 5-to 10-cm-wide alteration zone that consists of calcite, dolomite, diopside, hedenbergite, vesuvianite, and base-metal sulfides.
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Calcite, or calcium carbonate, is the main constituent of limestone and of cave formations such as stalagmites and stalactites.
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The samples from the andesitic units, occurring as tectonic lenses in the greywacke sequence, exhibit plagioclase phenocrysts altered to sericite, calcite and epidote, set in a matrix of chloritized pyroxene and amphibole.
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This occurrence is known for plates of complex rhombohedra of pink manganoan calcite.
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The fine skeletal structures of the corallites are typically obliterated; skeletons are composed of fine to coarse, neomorphic calcite.
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Included are marcasite and calcite from Goongewa zinc mine, wulfenite from Whim Creek copper mine, azurite from Teutonic Bore, and diamonds from Argyle diamond mine, along with a wide range of gold specimens from across the state.
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This cavity may then be filled with coal, calcite, siderite, or any other form of sediment.
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Along with subsequent calcite deposition, the pentameres are obliterated, the outline becomes rounded, and nodose sides appear.
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“Growth and composition of high-Mg calcite in the skeleton of a Bermudian gorgonian Plexaurella dichotoma: Potential for paleothermometry”
Pollack and Schrag at the NAS Panel « Climate Audit
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Matrix minerals of the dolostone septaria are ferroan dolomite, quartz, calcite, and pyrite.
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The copper contains many angular molds of calcite crystals and even a small group of native silver crystals; the matrix is a mineralized basalt.
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The carbonate (CaCO_ {3}), found as limestone, chalk, and other rocks, and as the minerals calcite and arragonite, is the most commonly occurring compound.
A Text-book of Assaying: For the Use of Those Connected with Mines.
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Sharp, clear magnesite rhombohedra may be mistaken for ‘Iceland spar’ calcite, but the density is a quick tip-off to the mineral's true identity.
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In some geodes, the brown calcite is completely hidden by clear calcite secondary growth.
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The ore - hunting indicator is of calcite - potassium feldspar veins containing pyritohedron pyrite.
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Around one corner, the mine became snow white with calcite and sodium chloride.
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Natural red chalk is obtained from the red ochre variety of haematite, natural grey chalk from brick clay, natural white chalk from the chalk variety of calcite or soapstone, and natural black chalk from carbonaceous shale.
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These mylonites are microstructurally more homogeneous than other types, and consist of very finegrained calcite that displays an elongate grain shape fabric.
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The veins are surrounded by a 5-to 10-cm-wide alteration zone that consists of calcite, dolomite, diopside, hedenbergite, vesuvianite, and base-metal sulfides.
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In seasonally wet tropical areas, tower karst hills are often residuals from past wetter climates and tend to have their caves partially filled by secondary calcite deposits.
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Barite, sphalerite, and calcite are the most abundant vein minerals; pyrite, kaolinite, chalcopyrite, galena, and wurtzite are less common.
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They were limestone, and seeping water had dissolved away the calcite.
LISTENING WOMAN
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The blobs correspond to vacuities in the dentine and are probably due to calcite or some other post-mortem infilling.
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The mineral calcite is made up of carbonate sheets and intervening planes of calcium ions.
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Striking specimens of red cuprite-included calcite and dolomite were once commonly available.
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Vein minerals are barite, calcite, chalcopyrite, kaolinite, pyrite, sphalerite, and wurtzite.
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Again, it is assumed that readers know aquamarine is beryl, amethyst is quartz, and Iceland spar is calcite but cannot grapple with the complexity of remembering that spessartine and grossular are garnets.
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Vein minerals are barite, calcite, chalcopyrite, galena, pyrite, and sphalerite.
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The barite and calcite form excellent euhedral crystals in concretions within the Cretaceous-age Mancos Shale.
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It is dominated by the deposition of calcite with minor pyrite, marcasite, barite, anhydrite and gypsum.
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The gold, in particles hardly visible to the eye, is in a sandy matrix and is associated with chloritoid, sericite, calcite, graphite, and other minerals.
The Economic Aspect of Geology
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Vein minerals are barite, calcite, chalcopyrite, kaolinite, pyrite, sphalerite, and wurtzite.
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The result of gravity separation for quartz - calcite type scheelite is not ideal.
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Layers and layers of calcite have created unique formations given magical names like cave pearls, popcorn and soda straws.
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Further on was another pocket, also in the ceiling; it was about 1.6 x 1.6 meters and completely lined with equant rhombs of calcite, each about 13 cm across.
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The heat and/or pressure experienced during metamorphism causes the calcium carbonate to recrystallize into a tightly interlocking mass of calcite crystals.
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The nonzeolites apophyllite, calcite, and quartz commonly occur at many localities.
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In these occurrences the tungsten mineral is almost invariably scheelite, and is associated with calcite, garnet, pyroxene, and other silicates.
The Economic Aspect of Geology
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At the Kingston mine, calcite occurred as thin massive veins cutting the lode and as modified rhombohedral crystals to 7 mm with inclusions of cuprite and chalcocite.
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The foraminifera in these dolomitized sediments are recrystallized, this means that the original calcite shells are replaced by dolomite.
Should Keller's Thin Sections Be Independently Tested? « Climate Audit
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Limestone is defined as a rock which contains at least 50 percent, which nearly always occurs as the mineral calcite.
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Lapis lazuli is an ornamental rock formed by the regional metamorphism of limestone; it has blue lazurite (sodium calcium aluminosilicate sulphate), white calcite, and pyrite as its main constituents.
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Associated minerals in the high-grade veins are calcite, ‘smaltite,’ nicoline, bismuth, and lesser pyrargyrite, proustite, acanthite, millerite, and chalcopyrite.
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Flow margins are often altered, containing abundant epidote and amygdales with quartz, calcite and/or chlorite.
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In such cases the cleavage of one stone is often of paramount importance in testing the cleavage of another, as is seen in the perfection of the cleavage planes of calcite, which is used in the polariscope.
The Chemistry, Properties and Tests of Precious Stones
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The ventral arm plates are nearly pentagonal with a distinct convex distal edge textured with layers of calcite forming a concentric pattern.
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Red chalcedony-lined geodes were prevalent at one time, their inclusions typically being quartz, calcite, ferroan dolomite, and iron sulfide microcrystals.
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Throughout the Timirovo thrust system, coarse-grained fragments of calcite veins form elongate boudins predominantly oriented parallel to the mylonitic foliation.
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The mordenite is associated with a hemispherical form of pale yellow calcite and cubic pyrite.
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The surface luster of many of the calcite crystals is frosted.
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Vein minerals are barite, calcite, chalcedony, and quartz.
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In the largest pockets, pale blue barite crystals formed coatings to 1 cm thick on the calcite crystals.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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The latter mode of origin is suggested by the frequent occurrence of calamine pseudomorphous after calcite, that is, having the form of calcite crystals.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"
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Some samples have hematite in the calcite veins.
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The composition of the lode is similar to that of the Isle Royale lode and consists of fragments of the oxidized brecciated flow top cemented by quartz, calcite, prehnite, and epidote.
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Several common carbonate minerals that form rhombohedra have been reported at the Lake George intrusive center: calcite, ferroan calcite, manganoan calcite, manganosiderite, rhodochrosite, and siderite.
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Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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Specimens of this unusual calcite are on display at the Mineral Museum.
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Vein minerals are barite, calcite, ferroan dolomite, and sphalerite.
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No particularly strong fluorescence of calcite, especially by comparison with glass, has been noticed.
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Experimental data ranges for both quartz and calcite rocks are indicated along the stress axis.
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Archaeocyathids, which are possible representatives of coralline sponges, have a secondary calcareous skeleton of high Mg-calcite and are possibly derived from demosponges.
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If you break a large piece of crystalline calcite, you are left with a regular, six-sided chunk of the mineral - a rhomb - which treats light in a peculiar way.
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Along this seam were occasional pockets from 0.1 to 0.5 meter across, lined with calcite rhombohedra.
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We climbed over the craggy outcrops of Cambro-Ordovician age Fort Burnside Formation and Jamestown Formation, crazily tilted beds of phyllite and slate and siltstone and stark white veins of calcite.
"Into a light that lingers."
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Explaining the mineral contents of this mosaic, Rose said, "the red is garnet, blue is turquoise, the lighter blue are crystals of calcite, the black is a very rare marble ... and the name of the marble is Orca, and her hair is made with California white quartz and citrine which is yellow quarts.
Denver Post: News: Breaking: Local
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Although levyne has been noted to have crystallized earlier than analcime, calcite, chabazite, and thomsonite, and later than analcime, cowlesite, and chabazite, it is usually the only mineral within the cavity.
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These images owe their existence to a layer of calcite, several millimeters thick in places, that preserved them from a cleaning with chlorhydric acid ordered in 1976 by a judicial administrator of the privately held cave.
Grotto Paintings Revealed
