Fluorspar is the commercial name for fluorite, a form of calcium fluoride (CaF 2). Pure fluorite contains % calcium and % fluorine. Fluorite is the primary source of fluorine, however relatively minor sources of fluorine include cryolite (Na 3 AlF 6 ), sellaite (MgF 2 ), topaz (Al 2 SiO 4 [F,OH] 2 ), villiaumite (NaF), bastnasite ([Ce,La][CO 3 ]F), and fluorapatite (Ca 5 [PO 4,CO 3 ...