Chemical Formula: CaF2
Color: All colors
Importance: The main use of fluorite is to supply the element fluorine. Fluorine that comes from fluorite is found in toothpaste, rocket fuels, and refrigeration fluids.
Other Interesting Information: Fluorite is one of the few fluorescent minerals, which means it glows under ultraviolet light. The term “fluorescent” is actually derived from the mineral fluorite.
My Take: Fluorite, although fairly common, is one of the more interesting minerals. It comes in so many different colors and so many different shapes that no specimen is ever very similar.
For More Information: http://www.minerals.net/mineral/fluorite.aspx