FAMOUSLUMINOUS glow resin pebble is a simulation photoluminescent product, made from resin plastic and photoluminescent materials,harmless, radioactive and toxic free. After thirty minutes of absorption of natural light, it can give off identifiable natural fluorescence over 10 hours in night.The size is 20-50mm. Here we can supply you red color,white color,green color & light purple color. If you have big order, the size and color could be customized. This resin glow pebble is widely used in to scenic spots, city park, home balconies,courtyards,fountains, fish tanks, path & road,home decoration,and any other decorative applications to beautify the environment.