Purple fluorite is the violet to deep-purple variety of the halide mineral fluorite (calcium fluoride, CaF₂). Its vivid color range—from pale lavender to royal purple—arises from trace elements such as yttrium and cerium, as well as from radiation-induced color centers within the crystal lattice. Fluorite crystallizes in an isometric (cubic) system, often forming well-defined cubes or octahedra. Collectors prize the purple variety not only for its striking hues but also for its relative...
