Fluorite is a colorful mineral composed of calcium fluoride (CaF₂). Known for its vibrant range of colors, including purple, green, blue, yellow, and clear varieties, it often forms cubic or octahedral crystals. Fluorite is prized for its beauty, fluorescence under UV light, and industrial uses, particularly as a flux in steelmaking and in the production of hydrofluoric acid. It is also popular among collectors and for metaphysical purposes.