Glow in The Dark Pebbles- Rocks Stone Mixed Color Garden Stone Outdoor 40JAOOTDTY Features: Place the stone under good sunlight or a light bulb for about 20 minutes and it will absorb light and glows in the dark for about 2-3 hours. Make your fish tank or vase even more special. These rocks are made into different conch shell shapes in different colors and will be shipped to decorate and wow your fish tank. All pebbles are made of acrylic, environmentally friendly to fish and plants. Use these pebbles to decorate fish tanks, aquariums, vases, water features, landscaping, garden walkways, yard grasses, flower pots and some DIY home decor. Wrapped in a transparent jar, these glowing stones make a great gift for family and friends. Specification: Material: AcrylicWeight: Approx.200gPackage Includes: 1 Pack Aquarium Rocksnote: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.