• synonyms


or flu·or spar

[floo-awr-spahr, -er-]
noun Mineralogy.
  1. fluorite.
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Origin of fluorspar

First recorded in 1785–95; fluor- + spar3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for fluorspar

Historical Examples of fluorspar

  • The fluoride of calcium, or fluorspar, may be used for this experiment.

    A System of Instruction in the Practical Use of the Blowpipe


  • Agricola derived the name fluores from fluo "to flow," and we in turn obtain "fluorite," or "fluorspar," from Agricola.

    De Re Metallica

    Georgius Agricola

  • Der′byshire-neck, a form of the disease goitre, occurring in Derbyshire; Der′byshire-spar, a fluorspar found in Derbyshire.

  • The production of fluorspar in the United States is several times that of any other country.

  • Fluorspar is the trade name for the mineral fluorite, which is composed of calcium fluoride.

British Dictionary definitions for fluorspar



  1. a white or colourless mineral sometimes fluorescent and often tinted by impurities, found in veins and as deposits from hot gases. It is used in the manufacture of glass, enamel, and jewellery, and is the chief ore of fluorine. Composition: calcium fluoride. Formula: CaF 2 . Crystal structure: cubicAlso: (US and Canadian) fluorite
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012