Fluorite is a mineral form of calcium fluoride (CaF₂). It is a common halide mineral that is often associated with lead and silver ores. It is also found in cavities, sedimentary rocks, pegmatites, and hot-spring areas. Fluorite is colorless in its purest form, but it can change color due to impurities and heat. The most common colors of fluorite are yellow, green, blue, and purple, but it can also be white, pink, reddish-orange, brown, and even black.