Fluorite (also called fluorspar or fluorine) is a mineral belonging to group III (halides) according to the Strunz classification, formed by the combination of the elements calcium and fluorine, with the formula CaF2 (calcium fluoride). Its crystal structure belongs to the cubic system, space group Fm3m, and it occurs in cubic, octahedral, and rhombic dodecahedral habits. It is a mineral that exhibits the physical properties of thermoluminescence and fluorescence (under ultraviolet light).