Noun
a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine
Source: WordNetAs of the late 1990s, five billion kilograms were mined annually. citation There are three principal types of industrial use for natural fluorite, commonly referred to as "fluorspar" in these industries, corresponding to different grades of purity. Source: Internet
Fluorite or fluorspar is called Blue John in the Peak District, the name allegedly coming from the French Bleu et Jaune which describes the colour of the bandings. Source: Internet
Mindat.org Presently, the word "fluorspar" is most commonly used for fluorite as the industrial and chemical commodity, while "fluorite" is used mineralogically and in most other senses. Source: Internet