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Sentence Examples The assemblage present included quartz, chalcopyrite, pyrite, sphalerite, magnetite, and hematite. The red sandstone is made up of quartz grains coated with hematite, an iron oxide mineral that gives the stone a red colour. The fluids that precipitated the veins were a likely source for some of the iron that formed the hematite. Among the simple oxides, only anatase and hematite have been found to date. The ironstone is locally represented by hematite matrix-supported vein quartz breccia. Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals. Like hematite, some goethite is pseudomorphic after a rhombohedral carbonate mineral. Tiny crystals of hematite, goethite, chalcopyrite, marcasite, and dolomite are common and make excellent micromounts. The lakebed is believed to contain hematite, a crystalline iron compound usually formed in the presence of water. Sandstones with this component contain authigenic hematite intergrown with kaolinite and illite and replacing muscovite. The hematite and the clays appear intergrown, suggesting that they co-precipitated. The partial inclusions of hematite take the form of microscopic rosettes of thin, splendent blue-black plates. I have always regarded specular hematite as a micaceous or platy form that would be very difficult to fashion into beads. Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite. The team achieved the gains by coating hematite, an iron oxide similar to rust, with nickel iron oxide. Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls. The third potential way the hematite could have formed is by oxidation of a mineral called magnetite in basalt and lavas. This colour change occurs over only a few metres on the ground and is probably related to the reduction of hematite to magnetite. An increasingly important source of iron for commercial uses is taconite, a mixture of hematite and silica. A spectrometer on MGS revealed a large deposit of hematite in the heavily cratered highlands. Show More Sentences Gray hematite more quietly occupies the rims of hot springs and geysers where its presence often goes unnoticed. In this specimen, limonite contributes to the bright central arc, while fine spherules of hematite suffuse the quartz with a purplish hue. At Azegour, Morocco, uraninite occurs in tactite with molybdenite, chalcopyrite, barite, pyrite, hematite, and garnet. The Badger Flats area is also well known for clinozoisite, garnet, hematite, scheelite, vesuvianite, wollastonite, and zoisite. He mentions that the amazonite occurred in association with orthoclase, smoky quartz, specular hematite, and rare anhydrite. He wears a top hat and coat-tails, and white spats on shoes the color of Alaskan hematite. Iddingsite is a mixture of orthopyroxene, maghemite, hematite, cristobalite, and amorphous silica that is formed from olivine. Brookite is best known from alpine-cleft-type occurrences, where it is round with anatase, rutile, titanite, quartz, adularia, albite, hematite, calcite, and chlorite. The hole anchored in bedrock at 13.0 metres and cut through wacke with local hematite and epitode alterations to 274.4 metres. Much hematite occurs in a soft, fine-grained, earthy form called red ochre or ruddle. It may also have a sparkle owing to inclusions of hematite, in which case it is called sunstone. Corundum, a member of the hematite group, is extremely rare at Mont Saint-Hilaire. Selected maps show jarosite and hematite, common products of the oxidation of iron-sulfide tailings. Leaching residues from zinc processing, dusts and sludges such as jarosite, hematite, goethite, etc. Hydraulically fractured gneiss with hematite, carbonate, quartz, and chlorite infilling. This was a steely gray specimen of the mineral hematite which, like many other stones, has a tradition of healing and additional magical influences. Some hematite replacement erases all traces of the original mineralogy. The early diagenetic precipitation of hematite and calcite took place during subaerial exposure and are the results of caliche and palaeosol formation. The red colour in the rock is due to the presence of hematite, an oxidized iron mineral. These nuggets contain the mineral hematite, which almost always forms in the presence of water. Show More Sentences Further south, a consortium led by Pan World Minerals International Inc. is planning to open a mine for the direct shipping of hematite ore. Calcite veins and hematite bands near the top reflect degassing of the flow interior. Any or all of these carbonate minerals may have acted as the now-replaced parent to the well-known pseudomorphic, rhombohedral replacements by hematite and goethite. 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. The replacement of the authigenic magnetite by hematite probably occurred at the same time as the specular hematite that surrounds the dolomite grains. Both areas were selected because they have an ancient layer of hematite, an iron oxide mineral that on Earth almost always forms in an aqueous environment. Iron, for example, is a common silver-white metal that melts at 1,535° C, is very malleable, and readily combines with oxygen to form the common substances hematite and magnetite. The presence of garnet, calcite, quartz and epidote, with mineralization associated with pyrite, chalcopyrite and hematite would correspond to a skarn-type area generally oxidized in rich in iron. Further hematite deposits were discovered, of sufficient size to develop factories for smelting and exporting steel. Specular hematite, albite, adularia, and quartz fill voids and form veins, and also occur as granulated fragments in the groundmass. Schwertmann U, Kampf N Properties of goethite and hematite in kaolinitic soils of southern and central Brazil. Pigments used include red and yellow ochre, hematite, manganese oxide and charcoal. The soils that are generally designated under the very vague term of laterite are rich in Iron and Aluminium sesquioxides such as goethite, hematite, gibbsite, and boemite. The veins are mainly made-up of pyrite, chalcopyrite, hematite, iron oxides and grey-white quartz associated with the Soraya formation and the Apurimac batholite. The crystals are of quartz, less often of calcite or dolomite, and sometimes of aragonite, ankerite, hematite, magnetite, pyrite, chalcopyrite, and sphalerite. Other minerals present in the upper zone include bornite, covellite, chalcocite, prousite, hematite, kaolin, and illite-smectite. The intrusive takes on a reddish hue due to hematite alteration. Yellow and blue magnesiocopiapite and aluminocopiapite, white epsomite and wilcoxite, and blue chalcanthite coat the hematite walls. Minor magnetite is present and some has been partly converted to hematite as martite. Small features: The stone of sun is a rather complete stone which borrows its virtues from the cornelian, from the amber, from the citrine and from the hematite. Show More Sentences Despite the large variety of mineralogical forms in which iron naturally occurs, only a few are commercially important, principally the ferrous oxides magnetite, hematite, limonite and ilmenite. The ores comprising blue and red hematite with goethite and limonite were formed by the leaching of the gangue minerals such as chert, silicates and carbonates. A number of minerals have been identified in Palmer Land, including magnetite, hematite, limonite, chalcopyrite, pyrite, and azurite, and traces of gold and silver have been discovered. The matrix includes scattered crystals of pyrite and hematite and the rock is penetrated by complicated branching fractures and vugs. In the mineralogical composition of the clay fraction, gibbsite, kaolinite and hematite stand out. Several drill holes completed in 1957, 1971-72 had intersected indications of an iron zone rich in specular hematite in the area west of the proposed mine site. The following major and minor minerals were identified in the samples examined: quartz, orthoclase, albite, anorthite, biotite, muscovite, garnet, secondary chlorite, kaolinite, magnetite, ilmenite, hematite, and apatite. Oolitic hematite occurs at Red Mountain near Birmingham, Alabama, along with oolitic limestone. Iron is commonly found in the Earth's crust in the form of an ore, usually an iron oxide, such as magnetite or hematite. Initial observations suggest that the enriched iron horizons were derived from schistose banded ironstone, with schistocity now seen as specular hematite. Small and intermediate size nodules at the top of the profile have the highest proportions of hematite and maghemite, no PDM, and minor amounts of hydrated mineral phases. Some of the noteworthy gemstones featured in rings this spring are opaque, sultry gems like moonstone, hematite, rutilated quartz, lapis lazuli and labradorite. The mineralization occurs within breccia cement and is associated with hematite, chlorite, ferroan dolomite, minor thorite, ilmenorutile and pyrite. Cassiterite, yazganite, hematite and trydimite mineral paragenesis have developed on the cavity walls as coating materials in the near-surface open fractures. He said that these two anomalies were geologically similar but that M63 had a higher hematite content associated with magnetite compared to M62 that is magnetite dominant. Detrital magnetite could have oxidized to hematite and goethite, while detrital ilmenite could transform to leucoxene during early diagenetic stages. This mineral is unique to the andesitic volcanic complex, occurring in association with tridymite, hematite, cassiterite, magnetite, orpiment and realgar. Placer environments typically contain black sand, a conspicuous shiny black mixture of iron oxides, mostly magnetite with variable amounts of ilmenite and hematite. Sometimes finely pounded cinder was used instead of hematite. Located about 450km north east of Geraldton, Padbury's flagship Peak Hill Iron Joint Venture is in the early stages of project development targeting magnetite and hematite. Show More Sentences KlEnppibEncken is an intrusive-related uranium deposit, hosted by brecciated and cataclastic granite which is strongly enriched in fluorite or hematite. The hematite and goethite occurrences are interpreted to result from alteration and enrichment of the magnetite-bearing BIF, particularly in areas of complex folding. The alteration consists primarily of a hematite, carbonate, albite, and sericite assemblage with the presence of pyrite being a strong indicator of the gold mineralization. Kaolinite, illite, quartz, microcline, dickite, mordenite, gamma alumina and iron rich minerals, such as pyrite and hematite, constituted the mineral makeup. Examples from Classical Literature Outstanding was an unusual bird pendant of hematite with crystal eyes set into drilled sockets with pion gum. Brown hematite, or limonite, has a chestnut brown color and contains very nearly sixty per cent. The compass is useless on these hills, as they are composed of micaceous iron ore, with brown hematite, which is very magnetic. A pigment made of micaceous hematite was found in one of the Sikyatki paint jars. The ochry variety or red-iron-ochre is distinguished from the solid hematite by the brightness of its colour. Their principal iron mineral is hematite, although the English ores also contain considerable iron carbonate or siderite. General Lomet uses a similar mixture to work up the softest varieties of hematite, with which he thus forms superior red crayon. Mr. Burch says that this ore resembles the Kirke ore, but has some of the characteristics of hematite. Near the right hand were two hematite celts, and on the shoulder were three large and thick plates of mica. Of the English ores, the common Lancashire hematite produces the best iron. There is also a small amount of hematite, pyroxene and sericite. The or-moulu colouring is a mixture of hematite, alum, and sea salt. It is a very valuable ore, but is less abundant than hematite. The streak of limonite is yellow, thus distinguishing it from hematite. Find more words! 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Words that rhyme with hematite What is the plural of hematite? What is the adjective for hematite? What is the noun for hematite? Use our Sentence Generator Nearby Words hematinic hematin hematic hematemesis hematein hemarthrosis hematocele hematochezia hematocrit hematogenous hematologic hematological 8-letter Words Starting With h he hem hema hemat hemati hematit