a common mineral, calcium fluoride, CaF2, occurring in green, blue, purple, yellow, or colorless crystals, usually in cubes: the principal source of fluorine, used also as a flux in metallurgy and for ornament.
fluor·ite (flŏŏr'īt', flôr'-, flōr'-) n. A mineral, essentially CaF2, that is often fluorescent in ultraviolet light and occurs in light green, blue, yellow, brown, and colorless forms. Also called fluor, fluorspar.
flu·or·spar (flōō'ər-spär', flŏŏr'spär') n. See fluorite.
fluorite (flr'īt') Pronunciation Key
A transparent to translucent mineral occurring in many colors, especially yellow and purple, and usually in cube-shaped crystals with octahedral cleavage. It is found in sedimentary rocks and in ore deposits within igneous rocks. It is often fluorescent in ultraviolet light. Chemical formula: CaF2.
[floo-awr-spahr, -er-] 
r-ahyt, flawr-, flohr-] 
r'īt') Pronunciation Key