fluorspar noun. ['flʊǝspɑ:] L18.
[from FLUOR + SPAR noun³.]
Calcium fluoride, CaF₂, occurring as a transparent or translucent mineral (colourless when pure but often variously coloured by impurities) which crystallizes in the cubic system and is used ornamentally and as a metallurgical flux. Cf. FLUOR noun 4b.

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