tridymite [trid-uh-mahyt] ExamplesWord Origin noun Mineralogy.

  1. a polymorph of quartz occurring in the form of small crystals, commonly twinned, in siliceous volcanic rocks.

Origin of tridymite 1865–70; German Tridymit, equivalent to tridym- (Greek trídym(os) triple, equivalent to tri- tri- + (dí)dymos didymous) + -it -ite1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 Examples from the Web for tridymite Contemporary Examples of tridymite

  • The crystals, called cristobalite and tridymite, swim in clouds around stars just before they begin to form planets.

    Space Bling: From Diamond Planets to Crystal Oceans to Precious Moon Jewels

    Alexa Valiente, Jaewon Kang

    October 13, 2012

  • Historical Examples of tridymite

  • Spherulites may be regarded as radiate aggregates of such microliths (mostly felspar mixed with quartz or tridymite).

    Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7


  • When crystalline grains or blebs of quartz occur, we have a quartz-trachyte; when tridymite is abundant, as in the trachyte of Co.

    Volcanoes: Past and Present

    Edward Hull

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