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How to use quartz in a sentence

Looking for sentences and phrases with the word quartz? Here are some examples.

Sentence Examples

Here it was associated with quartz, albite, schorl, muscovite, and microcline in the intermediate zone.
Around the tourmalines were a dozen more wall plates, including a fine quartz cluster weighing nearly 100 kilograms.
Some topaz forms spectacular crystals and matrix specimens on magnesite or quartz.
Other minerals found here are the red ochre, soap stone, white quartz and molding sand.
Mylonitic rocks usually have ribbon quartz and rotated albite porphyroclasts.
My necklaces are made mainly of semiprecious stones, such as agate, quartz, amber, rock crystal and jade.
Late chlorite and carbonates overgrew the schistosity defined by phengite, chlorite and quartz.
These granite dikes are composed almost totally of potassium feldspar and quartz.
Adjacent to the gray quartz with acanthite and gold is sugary white quartz with massive galena.
These soils have a typical, immature tropical soil mineral assemblage dominated by kaolin, quartz and goethite.
The siltstones are composed of angular quartz and rare feldspar, set in a finer matrix that locally contains some calcite.
Because they formed within the peat, coal balls generally contain very little detrital clay minerals and quartz.
Where pyrite crystals have been lost, it can be seen that quartz did not penetrate pyrite.
All three are dominated by unaltered muscovite, quartz, K-feldspar and albite, with minor epidote.
The sample is strongly foliated and consists of garnet, biotite, quartz, plagioclase and cordierite.
The grey colour of quartz is a mineralogical standard showing that the thickness is correct.
Outside we saw large tables covered high with specimens of kyanite in quartz.
The white material is quartz and the black is the wall rock from the edge of the vein.
As a result, quartz is an uncommon gangue mineral within most of the district.
The ore zone is a combination of veinlets, lenses, and nests of pyrite and quartz.
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There is much chlorite growth, but quartz is only very poorly recrystallized.
It was in that year that the original quartz clock was invented by W.A. Marrison and J.W. Horton.
The first person to build the quartz clock was a Canadian born engineer, Warren Marrison of Kingston, Ontario.
It is dominated by variably foliated, medium-grained, even-textured to porphyritic biotite hornblende tonalite and quartz diorite.
The cobbles are dominated by pink quartzite, red sandstone and vein quartz, with minor granite clasts near the contact and rare green clasts.
The pegmatites are composed of K-feldspar, quartz, plagioclase and biotite, with titanite, opaque minerals and apatite as accessory minerals.
This behavior is also common in two-material waveplates such as achromatic waveplates constructed from quartz and magnesium fluoride plates.
A few quartz specimens have included yellow to dull orange acicular crystals, identified by quantitative analysis as aegirine.
Sometimes iron sulfides have weathered, staining the quartz an orange color, both on the surface and within the crystals themselves.
They have a mineralogical association of quartz, diopside, actinolite, plagioclase and K-feldspar.
One stone to the west-south-west is white quartz, a stone that attracted special attention in the later Neolithic.
During this time the dissolved protein molecules are spontaneously adsorbed on the quartz surface.
In this case the surrounding sediment matrix is dominated by detrital quartz and illite along with various other clay minerals.
In the presence of kaolinite and illite, aggregate sizes were smaller and sinking rates lower than in the presence of smectite and quartz.
Water is passed through a disinfecting chamber containing a quartz mercury lamp that emits ultraviolet light rays.
Minerals such as wolframite, arsenopyrite, fluorite, and quartz are well known from this mine.
This and nearby districts are also known for perfect, doubly terminated wolframite crystals to 20 cm, perched on water-clear quartz.
Minerals from the ash and the silicon-rich water replaced the trees' organic material and, over the eons, assumed their form as quartz.
Associated with the quartz are crystals of almandine, kyanite, biotite, and magnesite.
I also used to always be attracted to certain types of minerals and gems, primarily quartz and amethyst.
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The junction pockets are commonly lined with quartz and calcite upon which zeolites and associated minerals crystallize.
Test walls appear to lack compositional zonation, consisting mostly of small quartz grains with some incorporated sponge spicules.
Monazite clusters occur in a variety of host minerals, including cordierite, quartz, biotite and andalusite.
In a PEM, a piece of crystalline quartz is electronically excited to resonate at a frequency determined by its shape and crystal orientation.
Morganite and quartz crystals are sometimes found within balls of fine-grained lepidolite within the pockets.
More accurate clocks based on the regular vibrations of a quartz crystal superseded them.
Some are made of pure quartz crystal, but many are made of other types of stone found in abundance on Earth.
Somewhat darker, but no less impressive, is a similarly large crystal of smoky quartz from the Ural Mountains.
Simultaneously, large quartz crystal groups were formed on the ceiling and walls of the cavern.
Rhodochrosite from the Sunnyside mine generally forms pale pink to strawberry-pink simple rhombohedra on plates of drusy white quartz.
The calcite formed scalenohedral and rhombohedral crystals on some of the quartz crystal groups.
The next few pockets yielded only dark blue apatite and clear to smoky to pale citrine quartz.
The nonzeolites apophyllite, calcite, and quartz commonly occur at many localities.
This calcite typically overgrows quartz and crystallizes before heulandite, stilbite, and apophyllite.
The limestone is highly fractured and contains abundant calcite and quartz veins.
In this specimen, limonite contributes to the bright central arc, while fine spherules of hematite suffuse the quartz with a purplish hue.
The phenakite is also associated with albite, limonite, smoky quartz, and topaz and is often overlooked because it resembles quartz.
Crystal gazing seeks visions allegedly seen in a ball of rock crystal, preferably quartz.
Compositionally, the most abundant types of lithic fragment are polycrystalline quartz varieties.
Her collection is not much but it includes mica, aquamarine, tourmaline, rubies and rose quartz.
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It was a mixture of curvy furniture and extravagant materials, including lapis lazuli, ivory, amazonite, ebony, horn, and rose quartz.
He rescues rose quartz from sculptors' scrap, polishes up and drills holes in for beading.
He's launched his boat in a clear pool where I can see the rose quartz he mentioned.
She noticed a polished, pale stone of rose quartz hanging from a golden chain.
An example is the circular silver gilt centerpiece that are repeated on the rim of the body and at the base of a rose quartz finial.
Pseudomorphs of marcasite, chalcopyrite, pyrite, arsenopyrite, pyrargyrite, magnetite, and quartz after pyrrhotite have been reported.
The data were reduced taking into account the neutron beam transmission through the quartz substrate and corrected for the background.
Detrital quartz from an igneous source is usually substantially brighter in luminescence than quartz of an authigenic origin.
Later, authigenic quartz was precipitated and carbonate phases were partly silicified.
I have used granite, sandstone and quartz type rocks and am continually placing rocks in various parts of the gardens to harness energies.
The sample is composed of K-feldspar, plagioclase and quartz with accessory apatite, magnetite, titanite, zircon and secondary epidote.
Lepidolite, beryl, tantalite, quartz crystals, and altered and unaltered petalite are some of the minerals that can be found in this district.
The crystals are perched on quartz along with rosin-colored sphalerite showing the black tarnish reported by him.
Associated minerals are azurite, quartz, plancheite, cerussite, and mottramite.
However, collecting in the pits has yielded beautiful microcrystals of azurite and malachite on quartz.
There are also excellent specimens of sceptered and reverse-sceptered quartz crystals.
Sprays of black schorl in quartz are some of its most sought-after minerals.
Initially, the glassy brown crystals associated with quartz and tennantite were misidentified as anglesite.
On this, the crystal and pearls are strung like a festoon of flowers, with hanging clusters terminating in big pieces of aqua quartz.
We have also noted clumps of small marcasite crystals as a late-stage association with galena and drusy quartz from the Eagle mine.
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Superb, equant tetragonal crystals occur on quartz in the junction pockets.
We collected excellent crystals of tetrahedrite to 5 mm scattered on drusy quartz from a zone in the siliceous envelope of the orebody.
The quartz grains are well-rounded and often show frosted, pitted surface textures.
Most of the crystals were standing on the quartz matrix, but a number were lying flat and were doubly terminated.
The metaconglomerates comprise monocrystalline or polycrystalline angular or subrounded clasts of quartz embedded in an arenaceous matrix.
We tipped the matrix of quartz on microcline and cleavelandite to remove the crystal, no easy job in the confined space of the pocket.
In one specimen stephanite was intimately associated with pyrite in a matrix of tabular calcite crystals, all on quartz.
Locally, intense brecciation gave rise to angular vein quartz fragments enveloped by a matrix of massive hematitic rock.
The Whin Sill complex is a large tholeiitic quartz dolerite intrusion in northern England.
A quartz watch powered by a battery is constantly powered and tells accurate time all the time and do not need time adjustment.
All other quartz veins are associated with at least some tourmaline, either within the veins or in the vein selvages.
Matrix minerals of the dolostone septaria are ferroan dolomite, quartz, calcite, and pyrite.
Many of the grains are partially to entirely replaced by fine-grained sericite and quartz.
Examples include at least some colored specimens of quartz, topaz, and fluorite.
There are excellent, beautifully illustrated sections on the feldspars, quartz, topaz, and beryl.
And they mewl and cry, their symphony invested with irony, which I merely attribute to a vein in the quartz.
The mineral assemblage comprises quartz, K-feldspar, albitic plagioclase, white mica, apatite, tourmaline and garnet.
These crystals were abundant in a very micaceous pegmatitic rock composed of muscovite, albite, and quartz with accessory schorl crystals.
Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
Some of the material contained micaceous masses of specular hematite associated with quartz, epidote, and numerous veinlets of calcite.
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Well-formed crystals of quartz, microcline, and albite typically line pocket walls.
The pegmatite is composed of microcline, plagioclase and quartz with minor amounts of clinopyroxene, orthopyroxene, ilmenite and zircon.
The aegirine was associated with aesthetic smoky quartz, microcline, and zircon.
The ash of beneficiated materials was richer in the basic oxides, while poorer in quartz.
Inclusions of quartz, tourmaline, apatite, and muscovite crystals have been described.
It consists of clasts of angular to rounded quartz, plagioclase, tourmaline and rock fragments, up to 3 mm in diameter.
After quartz and microcline, tourmaline is arguably the next most abundant mineral found in the miarolitic cavities.
The dominant magma types are basalts and hawaiites, with lesser amounts of trachytes, quartz trachytes, alkali rhyolites and phonolites.
The researchers used quartz crystals, like the wave transmitters in televisions and radios, which vibrate in an electrical field.
The abundant and ubiquitous quartz paramorphs after tridymite in the walls attest to a very shallow emplacement depth.
All four samples are medium-grained, and comprise variable proportions of hornblende, feldspar and quartz with accessory biotite and titanite.
These microfaults are commonly pulled apart with growth of new quartz and biotite between pulled apart feldspar and hornblende.
Irradiation at a low oxygen concentration was carried out in a tightly stoppered quartz cuvette purged with nitrogen.
Rather, the quartz crystals are cleanly truncated at the contacts, or they wrap themselves around the pyrites.
Slate is composed of clay, lime, quartz and blacklead, which because of thousands of years of pressure, have melted together.
The fine-grained sediment of the matrix is composed chiefly of siderite, with lesser amounts of illite, calcite, quartz, and bitumen.
The new gyro sensor boasts unprecedented stability thanks to the use of a monocrystalline quartz crystal for the newly developed gyro element.
In geologic terms the Vladaya granite is classified as a monzonite due to its low percentage of the mineral quartz.
Early in the 1800s, mineralogists recognized that tiger's-eye was a fibrous variety of quartz, or silicon dioxide.
Instead, silica is found in polymerized combinations with metals as silicates embedded in geologic rock formations, such as quartz.
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It yielded a 6-cm morganite on a large crystal plate of cleavelandite and quartz.
Mountain Lake sediment was primarily unconsolidated, and composed of sand-sized organic particles, quartz sand and clay aggregates.
This granulite consists of garnet, biotite, muscovite, quartz, plagioclase and cordierite.
The intervening host-rock layers are between 2 and 5 cm thick, being composed of biotite, sillimanite, garnet, muscovite, quartz and plagioclase.
Brittle deformation is evident from a number of fault planes showing quartz slickensides consistently dipping at c.40 deg to the southeast.
In a relatively simple procedure, the researchers made Silicon nanowires by sealing silicon monoxide in an evacuated quartz tube.
Small quartz grains are unstrained, and notable for the abundance of tiny fluid inclusions, some with vapour bubbles.
However, many of the samples contain both strained and unstrained quartz suggesting that some of the strain was inherited from the source area.
The sun caught a piece of quartz in the granite and lit the brilliance embedded there.
The granite rocks of the glacial valley contain quartz veins of silver, lead and zinc and at one time there were over 2 000 miners toiling there.
The order of deposition for the main vein minerals typically is dolomite, barite, and quartz.
Gold occurs in quartz veins with chalcopyrite, galena, pyrite, and sphalerite.
Injected into the granite are veins of quartz with green fluorite, which are the source of the amethyst.
The ultramafic and mafic intrusive rocks are cut by very few quartz veins and have not been found to host beryl or emerald.
Both the sandstone and andesite show strong quartz and chert veining and carry disseminated pyrite.
Very narrow vugs containing quartz crystals are encountered in the quartz seams at times, but these invariably are barren of gold.
The quartz here was in flat-lying beds just below the surface.
There are instances of quartz on almandine, quartz intergrown with almandine, quartz as an inclusion in almandine, and almandine as an inclusion in quartz.
These apophyses extend 50 pm into the adjacent quartz grains and, when viewed parallel to the grain boundaries, form irregular branching features.
Their quartz clock was a very large device as compared with today's quartz wristwatches which also use microchip and liquid crystal display technology.
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All one need do is hold a specimen of this material under a light to see countless reflections coming off of tiny crystal faces over the entire quartz surface.
The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
Faience is a glass-like material, made by heating a paste consisting of sand or crushed quartz, an alkali such as plant ash, and a glaze, until vitrification occurs.
I collected lots of olive-green botryoidal pyromorphite on quartz matrix.
Blue hexagonal beryl crystals and colorless, pale green, or blue topaz are found in cavities associated with microcline, smoky quartz, tourmaline, and, rarely, fluorite.
Foliation-parallel quartz veins are cross-cut and extended along microfaults, the sense of offset indicating the same shear sense as indicated by the biotite rhombs.
Particularly significant are the jet, amber and quartz items, valued as mortuary goods from prehistoric times onwards for their electrostatic and refractive properties.
This jeweler, though, is the master of recreating good fake jewellery and this season has produced some delightful pieces in rose quartz and garnet.
The Annascaul Formation is at least 500 m thick, and is dominated by mudrocks with subordinate quartz wacke sandstones, tuffaceous fine conglomerates and melange.
They collected several pegmatite pockets in which topaz was associated with both clear and smoky quartz, microcline, albite, muscovite, fluorite, and cassiterite.
Post et al. showed that quartz rheology is sensitive to water fugacity, but the above extrapolations do not apply to identical values of water fugacity.
It was a just a simple watch of course, intended for the wrist of a young child, but it had a quartz crystal and it kept good time and that was what mattered most.
For cladding-pumped laser experiments, some preforms have been jacketed with a second quartz glass tube in order to increase the cladding-core relation.
Made of sand-like quartz, sandstone comes in a variety of colors.
Brookite is best known from alpine-cleft-type occurrences, where it is round with anatase, rutile, titanite, quartz, adularia, albite, hematite, calcite, and chlorite.
Composite fillings are typically made of glass or quartz mixed with resins and adhesives.
In the vein's central vug, ferroaxinite overlies a selvage of quartz, orthoclase, and microcline feldspar and is followed by fine-grained calcite.
They often have grown around pre-existing acicular goethite crystals in random orientation, clearly demonstrating the quartz to be of a later growth.
The dominant non-clay mineral composition of the coarse fraction consists of biotite, quartz, and sanidine with lesser amounts of apatite and zircon.
Using materials native to New Zealand and semiprecious stones like aventurine, rose quartz and freshwater pearls, each of her pieces are totally original.
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The intervening area is dominantly a mixture of clay and quartz.
In 2008, NASA discovered crystals with a similar make-up to quartz surrounding young stars.
Epididymite was known several years ago from a few small crystals that occurred on some specimens and also as inclusions of white acicular crystals in smoky quartz.
Along the contact zone the limestones were recrystallized into a cloudy white, massive calcite containing grossular, epidote, magnetite, quartz, and tremolite.
The amazonite occurs in miarolitic cavities in granite as single crystals and crystal groups and is often associated with other minerals, especially albite and smoky quartz.
All basalt chemical compositions can be plotted in the basalt tetrahedron, which has normative quartz, olivine, nepheline and augite at the apices.
At the technical level, the bamboos were engraved by either a scorch-marking process or with sharp quartz flints, pieces of shell or other similar instruments.
The similarity of the shape of the columns to those of quartz crystals was once used to support the theory that volcanic rocks precipitated from water.
The foliation is marked by chloritc, white mica and minute quartz grains.
With the exception of quartz and the feldspars, few common rock-forming silicates are available in fine, collectible specimens on a regular basis.
Only the west-facing areas of the limestone, marble, and quartz, which get the brunt of the afternoon sunshine, remain dry and nearly bare of vegetation.
Calcite and barite actually crystallize after the formation of chalcedony and quartz cease and often infill or possibly cause subsequent fracturing of the agate.
The crystallization of barite followed the calcite and quartz.
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.
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.
Because they have no gears or escapements to disturb their regular frequency, quartz clocks are extremely accurate and have become the dominant timekeeping technology.
The quartz clock was so accurate and reliable, that already by 1939 it had replaced the mechanically-regulated clocks at the Observatory in Greenwich.
Also, the gear train of a mechanical watch is under constant load from the mainspring whereas the gear train in a quartz watch is not under any load.
One bore a wolf's fang, the other a plain quartz piece on a leather thong.
We adjusted the angles of incidence of the laser beam such that total internal reflection took place at the interface of the quartz slide and the sample solution.
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Mary chose a rose quartz which shone with a clear, soft pink light.
Using materials native to New Zealand and semi-precious stones like aventurine, rose quartz and freshwater pears each of her pieces are totally original.
A quartz crystal resonator depends on the piezo-electric effect to work. This effect converts a mechanical stress in a crystal to a voltage and vice versa.
Associated minerals include pyrophyllite, lazulite, quartz, various brightly colored iron oxides, barite, and a suite of microcrystalline phosphates.
In many cases, quartz overgrowths were preferentially corroded and dissolved in the presence of pyrophyllite, most likely during acidic metasomatism.
The formation of botryoidal aragonite and clotted micrite was followed by silicification of carbonate phases and precipitation of authigenic quartz.
Associated with the fayalite are quartz, amphibole, and magnetite.
In the lower third of the unit, a conspicuous 15-40 cm thick lignite with quartz grit matrix occurs and includes plant stem fragments, some more than 5 cm long.
Willman reported astrophyllite, biotite, molybdenite, and riebeckite associated with smoky quartz and microcline on Mount Kineo at North Cheyenne Canyon.
Quartz is colourless when pure but minute amounts of impurities or lattice imperfections give rise to varieties such as amethyst, cairngorm, rose quartz, and smoky quartz.
They measured the amount of different isotopes of xenon trapped in quartz crystals.
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.
A fine-colored amethyst, the purple variety of quartz, is also mined here.
First, Jon placed an emerald, a diamond, a rose quartz, a ruby, an amethyst, and several chunks of jade in a circle outside the door that led to the chambers.
Most desert soils are typically lithosols, the important constituents of which are resistate detrital quartz and accessory minerals such as zircon and secondary clay minerals.
The museum has a Saudi sculpture of a falcon on a perch, of inestimable value and stunning vulgarity, made from gold, quartz, rubies, emeralds, sapphires and 1,210 diamonds.
This crystal was glassy and was found associated with smoky quartz, microcline-perthite, biotite, zircon, bastnasite, and limonite after siderite.
Conglomerate clasts are principally volcanic rocks and greenish gray chert, with subordinate arkose, graywacke, siltstone, red chert, quartzite, white quartz, and limestone.
Chlorite and quartz stretching lineations plunge in a SW or WSW direction.
A small stamp mill operated on one of the many small high grade quartz veins from 1935 to 1937, and intermittently after that.
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It consists of shear parallel 1-3cm thick quartz ribbons and boudins with pyrite, chalcopyrite and sphalerite.
These included jasper, bowenite, rhodonite, rock crystal, agate, aventurine, quartz, lapis, lazuli andjade.
Distribution and petrogenetic behaviour of trace elements in granitic pegmatite quartz from South Norway.
Mineralization in drill hole QH-14-01 consists of fine to medium grained disseminated sulphides in sericite altered, sheared quartz monzonite.
Lamination, brecciation, and other sedimentary features of the dolomite are well preserved in this massive sheet of microcrystalline quartz.
The probe-start metal halide lamp has a discharge tube made of quartz glass.
Monocrystalline quartz grains are usually associated with derivation from granitic gneiss and recrystallised metaquartzite.
Leary-Alsip bricks contain quartz, microcline and muscovite in contrast with the Stephen bricks, which contain diopside and quartz.
Rhyolite consists of feldspar microlites, quartz, and minor K-feldspar, and exhibits only weak alteration.
Silicification is present in the form of vuggy silica, chalcedony banding and quartz veinlets.
Artifacts included stone flakes, red and yellow ochres, a grindstone and pieces of human-altered quartzite or white quartz.
Beach placer deposits of India essentially consist of ilmenite, rutile, garnet, zircon, monazite, sillimanite and quartz.
The particles of pyrite and quartz are also located in the material distinguishably.
The new pieces feature blue topaz, smoky quartz or blue pearl as a statement ring, earrings, charm or pendant.
Place a smoky quartz on your desk or at your workplace to protect yourself against stress or frustration.
The Property covers a zone of high-grade molybdenite float as well as a gold-bearing quartz vein epithermal system.
This latter worker may also have multiple headed torches and special lathes to help form the glass or fused quartz used for special projects.
Crystals are found throughout much of the Alpine region such as cinnabar, amethyst, and quartz.
Rhyolite tuffs contain pumiceous, glassy fragments and small scoriae with quartz, alkali feldspar, biotite, etc.
The frequent presence of rounded corroded quartz crystals, such as occur in rhyolitic lavas, helps to demonstrate their real nature.
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Their steam cavities are usually filled with calcite, but sometimes with quartz.
Minerals associated with graphite include quartz, calcite, micas and tourmaline.
They work by standing outside the circle at the stone directly opposite to the quartz stone concerned.
The most common rock types in plutons are granite, granodiorite, tonalite, monzonite, and quartz diorite.
Shales are typically composed of variable amounts of clay minerals and quartz grains and the typical color is gray.
Specular hematite, albite, adularia, and quartz fill voids and form veins, and also occur as granulated fragments in the groundmass.
Creamy white quartz contains black and grey sulfides with pyrite along the margins, cut by clear aphanitic chalcedony veins.
Non-metallic minerals are apatite, quartz, hornblende, actinolite, epidote, chlorite, Saussure, pomegranate.
Surface work has indicated shearing, strong sericitic to albitic alteration and quartz veining with grab samples to 1 gpt gold.
They include amber, turquoise, agate, lapis, amazonite, tiger eye, rose quartz, amethyst and black onyx.
The gold is associated with pyrite, pyrrhotite, quartz in veinlets, amphiboles and garnets.
The gold grains are hackly and contain quartz and, are consistent with having been derived from nearby quartz vein sources.
They can be weakly mineralized in places with arsenopyrite, pyrite and rare jamesonite and boulangerite in a quartz gangue.
Company geologists believe this block acted as a significant fluid trap in the contact zone with the quartz monzonite to the north-east.
They are former gold producers that exploited high-grade gold veins hosted in the quartz monzonites of the Idaho Batholith.
Although the mass is considered an entity, it is composed of different materials, ranging from dioritic to monzonitic quartz.
The Claims are underlain by granodioritic and quartz monzonitic, phases of the Jurassic Okanagan Batholith.
The main minerals in the sample are quartz, perthitic orthoclase, plagioclase with sericite, epidote and chlorite.
However, orthopyroxene, olivine and mangnetite were also detected in contaminated soils including allophane and quartz.
A 24-hour accurate quartz time clock facilitates precise setting for defrost start times.
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This rock unit, along with a thick sequence of supracrustals, forms the hanging wall to a quartz sericite altered mylonite zone.
The mylonitic foliation, which is defined by biotite, quartz, titanite and epidote, is deflected around the porphyroclasts.
The latter two minerals are important because they occur with fine visible gold and quartz crystals in drusy vugs.
Oxide mineralization consists of minor quartz veining associated with pitch limonite, cuprite, chrysocolla, malachite, and azurite.
These minerals include sheet kaolinite, vermiform kaolinite, k-feldspar, pyrite crystals, corrosion quartz and corrosion feldspar.
Drilling confirms mineralization is associated with abundant narrow quartz vein arrays, sulphides, silicification and local kaolinization.
It took the addition of a quartz vessel and a plasma to make the whole thing work.
The sampled sandstones are light grey, very fine-grained, weakly cemented arenite, mostly dominated by quartz grains.
Carving the Stone The stone for the monument, a Carboniferous quartz arenite, would have been obtained locally and was ideal for carving.
The magaripples occur on the upper bedding plane of a 35-cm thick, medium to coarse-grained quartz arenite.
Weak to moderate quartz and quartz-ankerite veinlets were observed in the drill holes along with locally weak to moderate argillic alteration.
Xenotime mineralisation is associated within an approximately east-west trending quartz vein in a sicified arkosic unit.
For example, Georgia's state rock is staurolite, and quartz crystal is the state gem.
The sets of minerals of this skarn include quartz, calcite, grossular, augite, and gypsum.
Alluvial goldfields and quartz reefings are in its vicinity, and good indications of coal.
The Tarkwaian series hosts a gold-bearing quartz pebble conglomerate unit called the Banket Formation.
Secondary minerals in these rocks include chlorite, calcite, Iron hydroxide, opaque mineral, Leucoxene and quartz.
By levigation the fine clay is separated from the quartz and run off to stiffen before being formed into brick and dried prior to transportation.
Analyses using a polarizing light microscope aids in identification of cellulose and various minerals such as quartz and feldspar.
Gangue minerals include quartz, calcite, adularia, minor fluorite, and trace amounts of pyrite, marcasite, and chalcopyrite.
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In the Eastern Zone host rocks are silicified, limonitic, well fractured and locally host quartz vein stockworks.
A two part drilling program is aimed to test quartz roscoelite mineralisation which is associated with bonanza gold grades.
Start by purchasing a Jade Egg, a smooth, egg-shaped stone typically made of jade but sometimes made of rose quartz or obsidian.
Place a rose quartz or amethyst by your bed or under your pillow to have a soothing effect and rejuvenate oneself.
Also in the 1930s prospector Ben Nicker extracted alluvial gold and gold from quartz reefs in the area around what is now called Mt Nicker.
The host lithology is a dolomitic unit that has undergone stylolitic quartz and manganese veining and brecciation.
Kaolincoating in stylolites, effect of quartz cementation and general implications for dissolution at mineral interfaces.
The spectacular rutilated quartz crystal from which the carving originated was found in Brazil in 1987 and weighed 800 pounds when unearthed.
Rutilated quartz, moonstone, spinel, agate, amber and onyx are subtle choices when set into a blackened precious metal setting.
Finally, the observed fractal shape of sutured quartz grain boundary has its implications for geothermometry.
The move will enable the company to develop and supply quartz glass housings for a new, high efficiency plasma lamp.
These forests from on white sand soils of extreme infertility, made up mainly of quartz podzols.
Weathering over the past 70 years has partially devitrified the glass, resulting in fragments that are not as hard as pure quartz.
For example, Zeolite was dominated by heulandite, with lesser amounts of quartz and smectite.
The quartz veins hosting this mineralization are commonly banded with scorodite and arsenopyrite and range in width from 10 to 30 centimeters.
The largest patch seen, which is about 2 cm. across, is a milky white crystal almost filling a small vugh in otherwise barren white quartz from the 3-level.
A petrographic microscope can consistently identify quartz sand.
Strong quartz alunite adularia open space was found associated with another coincident mag low and potassium high in the northern portion of the property.
Below us the white granite and quartz of the most sacred of Inca sites sparkled, its Toblerone-shaped walls and deserted craters stretching over seventy acres.
Siliciclastic material is mostly represented by clay, except in the Aseri Formation, where phosphatic or goethitic ooliths and admixture of quartz sand are recorded.
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The analysed quartz crystallization temperatures are close to lower values of wiborgite crystallization temperatures from the Wiborg and Salmi rapakivi batholiths.
Gold mineralization occurs within quartz-pyrite veins occupying shear and dilatant structures within a 4 km diameter subcircular quartz diorite intrusion.
The Project area contains four principal gold bearing quartz veins that were previously mined via shallow open pits within granodiorite host rocks.
Among the crystalline schists of many regions, green beds or green schists occur, which consist of quartz, hornblende, chlorite or biotite, iron oxides, feldspar, etc.
Trachyte tuffs contain little or no quartz but much sanidine or anorthoclase and sometimes oligoclase feldspar, with occasional biotite, augite and hornblende.
The composition of almost all lava of the Earth's crust is dominated by silicate minerals, mostly feldspars, olivine, pyroxenes, amphiboles, micas and quartz.
Here calcite is present as dense crystals in abundant glaebules where it forms micritic hypocoatings that cement quartz grains of varying size and shape.
One word that almost beat him, though, is pneumonoultramicroscopicsilicovolcanoconiosis which means a form of pneumoconiosis caused by very fine silicate or quartz dust.
The tools included handaxes, cleavers and scrapers, and the quartz rocks used were sufficiently abundant for tools to be discarded after only short periods of use.
Specifically, they are located within the Scrag Lake biotite monzogranite pluton in which quartz, K-feldspar, plagioclase, and biotite are the major mineral constituents.
For fly ash, peaks of quartz and mullite dominate the XRD spectra.
Resting on a Bowenite stand, the pink guilloche enamel egg opens to reveal a bouquet carved from rock crystal, rose quartz and blue topaz, each with a diamond at the centre.
As with the quartz crystal in a watch or crystal radio set, the crystal in a QCM has a resonant frequency where it has the greatest response to an electrical stimulus.
In terms of composition, these intrusive rocks are quartz monzonites.
Some small deposits of lead, zinc, copper, gold, quartz sand and phosphorite have been mined in the past, while iron, bauxite and nickel reserves have been discovered.
The 25-cm-thick shell-bearing interval consists primarily of clayey and very fine-grained sandy siltstone, with the dominant minerals being moganite and quartz.
Content covers topics such as glass and recycled materials, natural stone applications, countertop design, granite, fabrication advice, and quartz.
Schieber's team examined micrometer-scale quartz grains using scanning cathodoluminescence, a type of electron microscopy good for detecting textural differences.
The unidirectional quartz tube heaters are ideal for web processing applications, paint finishing and even suitable for certain clean room type operations.
Additionally, tin and tantalum mineralisation, in quartz and pegmatite veins within a granodiorite host, has been identified by on-site geologists in a number of samples.

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