Description These colorful glow stone can be used as decoration for fish tanks, plants, vases or other places. Great for aquarium decoration, making your fish tank shiny and beautiful. Please expose the stones to the sun in the daytime to absorb enough light, so that they can glow in the night better. Features - Color: Mixed color. - Material: Photoluminescent pigment, resin. - Size: About 3 * 2 * 1 cm/ 1.2 * 0.8 * 0.4 in. - 60 piece set of man-made pebbles. - Expose the items to the sun in the daytime to absorb enough light, so that they can glow in the night better. - It is a good gravel ornament for your garden, yard or aquarium fish tank. - Keep from children for chocking hazard.