• WordNet 3.6
    • n quartz a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
    • n quartz colorless glass made of almost pure silica
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Webster's Revised Unabridged Dictionary
    • n Quartz (Min) A form of silica, or silicon dioxide (SiO2), occurring in hexagonal crystals, which are commonly colorless and transparent, but sometimes also yellow, brown, purple, green, and of other colors; also in cryptocrystalline massive forms varying in color and degree of transparency, being sometimes opaque.☞ The crystalline varieties include: amethyst violet; citrine and false topaz, pale yellow; rock crystal, transparent and colorless or nearly so; rose quartz, rosecolored; smoky quartz, smoky brown. The chief crypto-crystalline varieties are: agate, a chalcedony in layers or clouded with different colors, including the onyx and sardonyx; carnelian and sard, red or flesh-colored chalcedony; chalcedony, nearly white, and waxy in luster; chrysoprase, an apple-green chalcedony; flint hornstone basanite, or touchstone, brown to black in color and compact in texture; heliotrope, green dotted with red; jasper, opaque, red yellow, or brown, colored by iron or ferruginous clay; prase, translucent and dull leek-green. Quartz is an essential constituent of granite, and abounds in rocks of all ages. It forms the rocks quartzite (quartz rock) and sandstone, and makes most of the sand of the seashore.
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Century Dictionary and Cyclopedia
    • n quartz The common form of native silica, Or the oxid of silicon (SiO2). Silica is also found in nature in the minerals opal and tridymite (which see). Quartz occurs crystallized and massive, and in both states is most abundantly diffused, being one of the constituents of granite, gneiss, and many other crystalline rocks, forming quartzite and sandstone, and making up the mass of the sand of the sea-shore. When crystallized it commonly occurs in hexagonal prisms, terminated by hexagonal pyramids. It belongs, however, to the rhombohedral division of the hexagonal system, and its forms are sometimes very complex. Optically it is remarkable as exhibiting the phenomenon of circular polarization, the right- and left-handed character of the crystals optically corresponding to the arrangement of the modifying trapezohedral planes present. It scratches glass readily (hardness 7), gives fire with steel, becomes electrified by friction, and also by heating and pressure. It is infusible in the flame of the blowpipe, and insoluble in ordinary reagents except hydrofluoric acid. Its specific gravity is 2.66 when pure, and the luster vitreous or in some cases greasy to dull. The colors are various, as white or milky, gray, reddish, yellowish, or brownish, purple, blue, green. When colorless, or nearly so, and crystallized, it is known as rock-crystal (which see): here belong the “Lake George diamonds,” etc. Other distinctly crystalline varieties are the pink, called rose-quartz; the milk-white, milk-quartz; the purple or bluish-violet, amethyst; the smoky-yellow or brown, smoky quartz or Cairngorm stone, called morion when black or nearly so; the yellow, false topaz or citrine; the aventurin, spangled with scales of mica or hematite; sagenitic, containing acicular crystals of rutile; the cat's-eye, opalescent through the presence of asbestos fibers. The cryptocrystalline varieties are named according either to color or to structure: here belong chalcedony, agate in many forms, onyx, sardonyx, carnelian, heliotrope, prase, chrysoprase, flint, hornstone, jasper, basanite, agatized wood, etc. (see these words). The transparent varieties of quartz (amethyst, smoky quartz, etc.) are used for cheap jewelry, also when colorless for spectacles (then called pebble), and for optical instruments. Quartz prisms are useful in spectrum analysis, since quartz is highly transparent to the ultra-violet rays. (See spectrum.) Beautiful spheres of rock-crystal, sometimes several inches in diameter, occur in Japan. The massive colored kinds of quartz are much used as ornamental stones, especially the agates and agatized or fossil wood, onyx, etc. In these cases the colors are often produced or at least heightened by artificial means. Pulverized quartz is employed in making sandpaper; also when pure for glass-making, and in the manufacture of porcelain. Quartz-veins are often found in metamorphic rocks, and frequently contain rich deposits of gold; hence, in California and other gold-mining regions mining in the solid rock is commonly called quartz-mining, in contradistinction to placer and hydraulic mining. See cut under geode.
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Chambers's Twentieth Century Dictionary
    • n Quartz kworts the common form of native silica, or the oxide of silicon, occurring both in crystals and massive, scratching glass easily, and becoming positively electrical by friction, colourless when pure—Rock-crystal, Common, and Compact Quartz
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Webster's Revised Unabridged Dictionary
G. quarz,
Chambers's Twentieth Century Dictionary
Ger. quarz.


In literature:

Among other things was a box of quartz diamonds, which, being small, flew in all directions.
"Trifles for the Christmas Holidays" by H. S. Armstrong
On the summits are found conglomerates formed of quartz, limestone, and sandstone.
"Roumania Past and Present" by James Samuelson
Arrange the atoms of silica in one way and you have a quartz pebble, in another way and you have a precious stone.
"The Breath of Life" by John Burroughs
They at length reached the Louisa Diggings, near those quartz-ridges where, in fact, a 106 lb.
"Chambers's Edinburgh Journal, No. 430" by Various
There was a round quartz window, showing the inside of steel-plate windows beyond it.
"Operation: Outer Space" by William Fitzgerald Jenkins
A ridge of quartz rocks strikes up through the sand.
"Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2" by James Richardson
In general, sand consists of finely broken crystals of silica or quartz.
"Outlines of the Earth's History" by Nathaniel Southgate Shaler
One was flint, the other was quartz.
"The Cave Boy of the Age of Stone" by Margaret A. McIntyre
Paint mortar of a small round quartz boulder.
"Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879" by James Stevenson
His poetry is once more the refining element, beautifying the ugly, ennobling the mean, a vein of gold in the quartz.
"The Growth of English Drama" by Arnold Wynne

In poetry:

A quartz-clear dawn
Inch by bright inch
Gilds all our Avenue,
And out of the blue drench
Of Angels' Bay
Rises the round red watermelon sun.
"Southern Sunrise" by Sylvia Plath
Luck, boys, luck! — a nugget of gold
Big as my fist in the blest black mould!
Luck! — a gallon of bright yellow grains
Dotted like stars in the white quartz veins!
"Good Luck! (A Ballad For The Gold-Digger)" by Martin Farquhar Tupper
Enough to snuff the quick
Of her small heat out, but before the weight
Of stones and hills of stones could break
Her down to mere quartz grit n that stony light
She turned back.
"Hardcastle Crags" by Sylvia Plath
It was GOLD,--in the quartz,
And it ran all alike;
And I reckon five oughts
Was the worth of that strike;
And that house with the coopilow's his'n,--which the same isn't bad
for a Pike.
"Dow's Flat" by Francis Bret Harte
Loam-humps, he says, moles shunt
up from delved worm-haunt;
blue fur, moles have; hefting chalk-hulled flint
he with rock splits open
knobbed quartz; flayed colors ripen
rich, brown, sudden in sunlight.
"Ode For Ted" by Sylvia Plath
We got a likely-looking bit of quartz and faked it up
With dabs of golden paint; then called him in.
Oh, he went clean off his head; it was gold for sure, he said.
And if we'd sell our claim he'd raise the tin.
"Hopeful Hawkins" by C J Dennis

In news:

Quartz Mountain's summer arts program expands to piano.
Quartz Mountain's summer arts.
Evertz has agreed to acquire the assets of Quartz Electronics, a Reading, U.K.-based company specializing in master control systems.
NAB2005 will be the public launch of Quartz 's QMC-2 - a new high-end master control product in the QMC range.
Despite its low price, Quartz Audio Master Promise is feature-packed.
First impressions of Quartz .
Atlantic Media's Quartz Adds Another Gawker Alum.
I'm pleased to see that Terracotta has made the investment to continue the improvement of open-source Quartz and also produce a new commercial release of Quartz Scheduler that includes pow...
Alterna Reserve luxury vinyl tiles capture the colors and textures of travertine stone, quartz, and slate while offering a softer feel underfoot.
Jackie Snow is a writer for Quartz.
Terracotta delivers a series of enhancements to the open-source Quartz job scheduler, including Quartz 2.0, Quartz Manager and Quartz Where.
Terracotta Enhances Quartz Java Job Scheduler.
Ritchie S King is a reporter and visual journalist at Quartz, focusing on infographics and interactive features.
Steve LeVine is the Washington correspondent at Quartz.
Crescenta Valley picks apart Quartz Hill at home.

In science:

The quartz prism introduces an angular displacement of ∼ 2◦ between the two orthogonal polarizations, which creates an effective position displacement of 7 mm (70 µm) in the image (ob ject) plane.
Polarized light emission from individual incandescent carbon nanotubes
Yugoslav physics to the Project end. Many other contributions, however, including the future measurements of 10Be and 26Al in samples of quartz from the same locality to be performed by AMS in Vienna (W.
The Neutrino - Its Past, Present and Future
To bury the drive mass pattern, the polished side of the die was mounted on a quartz backplane, which became the bottom of the drive mass.
Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns
The capacitive position sensor (CPS) was based on the design described in Ref. . A quadrature pattern of gold electrodes was patterned on a quartz substrate and these electrodes were mounted on the bimorph stage.
Constraints on Yukawa-Type Deviations from Newtonian Gravity at 20 Microns
In Franken and Ward’s discussion of quartz crystal, the macroscopic symmetry of the crystal is the same as the microscopic symmetry of the unit cell.
Reconsideration of Second Harmonic Generation from neat Air/Water Interface: Broken of Kleinman Symmetry from Dipolar Contribution