• WordNet 3.6
    • n fluorite a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine
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Webster's Revised Unabridged Dictionary
    • n Fluorite (Min) Calcium fluoride (CaF2), a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in cubes with perfect octahedral cleavage; also massive. It is used as a flux. Some varieties are used for ornamental vessels. Also called fluor spar, or simply fluor.
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Century Dictionary and Cyclopedia
    • n fluorite Same as fluor-spar.
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In literature:

Fluorspar is the trade name for the mineral fluorite, which is composed of calcium fluoride.
"The Economic Aspect of Geology" by C. K. Leith
Diamond, marble, and fluorite are examples.
"The Nature of Animal Light" by E. Newton Harvey
Many of these granites contain tourmaline, fluorite and monazite.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3" by Various

In news:

Built to bring three light wavelengths (red, green and blue) into focus at the same point and reduce chromatic aberration, using ED, HD or fluorite glass.