Purple fluorite tumble stone displaying vibrant purple color. Purple fluorite is a calcium fluoride mineral with isometric cubic crystals of low hardness. Pure fluorite is allochromatic, i.e. colorless and transparent, but elemental impurities make it variously colored. Tumble stones can be carried in wallets, purses and pockets or kept in the work area and homes. Tumble stones can also be used in rings, pendants or necklaces. Purple color stimulates the third eye chakra, enhancing intuition and spiritual insight.