Calcium fluoride, better known as fluorspar, is a naturally occurring, nonmetallic mineral that is used in the steel, cement, glass and ceramics industries, primarily to save energy in the production process.  The essential function of fluorspar is as a flux, an additive that reduces the temperature at which substances as steel and glass melt.  In its naturally occurring state, fluorspar is classified as metallurgic grade.

Acid-grade fluorspar is a concentrated mineral from which some impurities have been removed. When combined with sulfuric acid, which comes from sulfur, acid-grade fluorspar creates hydrofluoric acid. Hydroflouric acid is used primarily in the manufacture of the refrigerant gas used in air conditioners for homes, buildings, automobiles, trucks, and airplanes, as well as in refrigerators and freezers. It is used as a propellant in the manufacture of gasoline and in the pickling of stainless steel, and it is used to manufacture nuclear fuels, integrated circuits, antiadherent resins, and fluoridated salts such as lithium salts for batteries, and sodium salts for toothpastes.

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