Rainbow fluorite is a colorful variety of the mineral fluorite (calcium fluoride) that displays bands or zones of different colors—often including purple, green, blue, and yellow—appearing as internal “rainbows” within a single crystal or cluster. It forms in hydrothermal veins and cavities where fluorine-rich fluids precipitate calcium fluoride as temperatures and pressures change, frequently associated with minerals such as quartz, calcite, and sulfides. Crystals commonly develop cubic or octahedral shapes and can exhibit zoning when trace elements or radiation alter color during growth. Significant localities for rainbow fluorite include parts of China, Mexico, England (notably Derbyshire), and the United States (such as Illinois and Colorado), where mine spoil and vein deposits yield attractive specimens for collectors.

Metaphysically, rainbow fluorite is often regarded as a highly stabilizing and clarifying stone that aids mental focus, decision-making, and the organization of thoughts and information. Many crystal practitioners use it to balance and cleanse the aura, align the chakras—particularly the third eye and heart—and to facilitate intuitive insight while reducing mental clutter and stress. It is also considered protective against negative energies and electromagnetic pollution, and is commonly used in meditation, study spaces, or work areas to enhance concentration and emotional equilibrium.