The luminous pearl is fluorite. Main component CaF2. After the pure fluorite ore is polished by ball milling. You have lighting conditions. Fluorite will fluoresce when heated or irradiated by ultraviolet rays. The more transparent fluorite is in the dark, the stronger the light is. At night, there are other fluorescent substances, such as some radioactive minerals, which will produce fluorescence when they decay. The luminous pearl is a pure fluorite ball.