chalcedony

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English[edit]

Etymology[edit]

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Pronunciation[edit]

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Noun[edit]

A cut and polished chalcedony geode.

chalcedony (plural chalcedonies)

  1. A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally.
    • 2012 March 1, Lee A. Groat, “Gemstones”, in American Scientist[1], volume 100, number 2, page 128:
      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.)

Translations[edit]

See also[edit]

External links[edit]

  • chalcedony Barthelmy, David (accessed 29 August 2016) Webmineral Mineralogy Database[2]
  • chalcedony mindat.org[3], Hudson Institute of Mineralogy, accessed 29 August 2016