Decorative gravels glow in the dark

Glow in the dark stone is made from glass and photoluminescent powder produced by our own factory, radioactive and toxic free. After ten minutes of absorption of natural light,it can give off identifiable natural fluorescence in the dark or at night for the next 8 to 10 hours.And this absorb and emit light process is repeatedly.Our goods is Non-toxin, Harmless, Non-radiation, Eco-friendly.The decorative gravels are applicable to scenic spots, City Park, home balconies, courtyards, fountains, fish tanks, path, road, resin bound systerms,and any other decorative applications to beautify the environment.