Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A variety of silica that contains microcrystalline quartz.
  • noun A siliceous rock of chalcedonic or opaline silica occurring in limestone.

from The Century Dictionary.

  • noun A cryptocrystalline variety of quartz, also called hornstone, petrosilex, or rock-flint.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Min.) An impure, massive, flintlike quartz or hornstone, of a dull color.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology, uncountable Massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral.
  • noun countable A flint-like tool made from chert.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun variety of silica containing microcrystalline quartz

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Origin unknown.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Unknown.

Examples

  • The Lake Superior iron formations now consist near the surface mainly of interbanded quartz (or chert) and hematite, called _jasper_ or _ferruginous chert_ or _taconite_.

    The Economic Aspect of Geology

  • Chert is sometimes called hornstone; also the term chert is often applied to any impure flinty rock, including jaspers.

    Tseh So, a Small House Ruin, Chaco Canyon, New Mexico :

  • And why I have begun this column with what seems like a chain of free association is something that will probably become only marginally clear to you when I tell you that it was triggered by the news, last year, of the discovery at the Natural History Museum in London of the oldest known insect fossil, embedded in a chunk of a crystalline rock from Rhynie, S.otland known as chert -- a fossil that dates from the very same S.lurian period, four hundred million years back, that saw the flourishing of the eurypterids that T.S. Eliot's "ragged claws" line unaccountably calls to my mind.

    Asimov's Science Fiction

  • When all you have is a knife (only carbon blades work; stainless is too hard), you may be able to get a spark by striking its back with a sharp stone chip, such as chert or flint.

    How to Find (and Ignite) Six Natural Fire Starters

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

  • We don't use the kind of chert that we used to because we don't have the type of chert roads, but this will work out better because it will cut our costs down. "

    Sand Mountain Reporter: News

Comments

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  • "Climb a long tall hick'ry

    Bend it over, "skinnin' cats."

    Playin' baseball with chert rocks

    Usin' sawmill slabs for bats"

    _excerpt of lyrics from Mountain Music by Randy Owen of the band Alabama

    February 4, 2008

  • Ubi sunt the blue-green algae of yesteryear that by photosynthesis first oxygenated the atmosphere? In the black cherts of the Bulawayan Limestone Group dated at about three thousand one hundred million years old, in the stromatolitic sediments first noted by Macgregor, later corroborated by Schopf et al; that is where.

    - Peter Reading, C, 1984

    August 2, 2008

  • "Quartz and chert and schist and chondrite iron scabs in granite. Very old land. Look around you. The horizon trembling, shapeless. We are all of us brothers."

    - David Foster Wallace, 'The Pale King'.

    April 5, 2011