Fluorite is a calcium fluoride mineral with the chemical formula CaF₂. It comes in a wide range of colors, including purple, blue, green, yellow, and colorless, often with zoned or banded color patterns. Fluorite is known for its fluorescence under ultraviolet light, where it can glow in vivid colors. It has a Mohs hardness of 4, making it relatively soft, and is often used in decorative carvings, beads, and collectible specimens. Fluorite is found in many locations worldwide, including China, Mexico, the United States, and England.