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Chalcedony vs Chert - What's the difference?

chalcedony | chert |

As nouns the difference between chalcedony and chert

is that chalcedony is a form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally while chert is massive, usually dull-colored and opaque, quartzite, hornstone, impure chalcedony, or other flint-like mineral.

chalcedony

English

Noun

(chalcedonies)
  • A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.
  • *{{quote-magazine, date=2012-03
    • , author=Lee A. Groat , title=Gemstones , volume=100, issue=2, page=128 , magazine=(American Scientist) citation , passage=Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony , garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)}}

    See also

    * (noun: types of minerals) agate, chert, flint, moganite * (adjective) conchoidal * (adverb) conchoidally * (noun) break, fracture, flake, shatter * (verb) knapp, break, fracture, flake, shatter

    chert

    English

    Noun

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

    • Usage notes

    Generally, in mineralogy and geology, a chert does not have a conchoidal fracture. In North American archeology the term chert occasionally is still used for various siliceous minerals (including flint) that have a conchoidal fracture; this leads to confusion between the terms flint and chert in some archeology texts.

    See also

    * chalcedony * flint * jasper * quartzite * silicate

    Anagrams

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