Fluorite Freeform

Fluorite is the mineral form of calcium fluoride, CaF₂. It belongs to the halide minerals. It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 4 as fluorite.

Fluorite is frequently found in cavities in limestone in quarries and in ore deposits. More rarely, it is found in cavities in coarse granite-type rocks (especially pegmatites) and even in volcanic flow rocks such as rhyolite.