Fluorite is a mineral with a veritable bouquet of brilliant colors that include purple, blue, green, yellow, colorless, brown, pink, black and reddish orange. Fluorite certainly deserves the title "The Most Colorful Mineral in the World". Most specimens of fluorite have a single color, but a significant percentage of fluorites have multiple colors and the colors are arranged in bands or zones. "Blue John" is a fluorite variety banded with colors and white, found only in Derbyshire, England.
Fluorite glows when heated and fluoresces under ultraviolet light. With a hardness rating of 4 on the Mohs scale, fluorite is a soft stone that should only be used for pendants, brooches or earrings. Fluorite is a very affordable and attractive gem. The origin of the word fluorite comes from the Latin verb to flow. Ancient Romans believed that drinking alcoholic beverages from vessels carved of fluorite prevented drunkenness.