"fluorite." YourDictionary, n.d. Web. 18 December 2018. <https://www.yourdictionary.com/fluorite>.
fluorite. (n.d.). Retrieved December 18th, 2018, from https://www.yourdictionary.com/fluorite
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.
The refractive indices of all glasses at present available lie between 1.46 and 1 90, whereas transparent minerals are known having refractive indices lying considerably outside these limits; at least one of these, fluorite (calcium fluoride), is actually used by opticians in the construction of certain lenses, so that probably progress is to be looked for in a considerable widening of the limits of available optical materials; possibly such progress may lie in the direction of the artificial production of large mineral crystals.
FLUOR-SPAR, native calcium fluoride (CaF 2), known also as Fluorite or simply Fluor.