Source : Webster's Revised Unabridged Dictionary (1913)

Fluorite \Flu"or*ite\, n. (Min.)
   Calcium fluoride, 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}.

Source : WordNet®

fluorite
     n : a soft mineral (calcium fluoride) that is fluorescent in
         ultraviolet light; chief source of fluorine [syn: {fluorspar},
          {fluor}]