GENEROUS SUPPLY OF GARDEN STONES - Decorate virtually any space with this generous supply of glow-in-the-dark garden stones. These white-to-blue rocks come in packs of 500, ensuring you have plenty to use as garden decorations, fish tank rocks, or rocks for plants. VIBRANT ACCENTS - Bring a fun, colorful touch to yard decor and garden decorations with these glowing blue rocks. The white color meshes well with garden accessories when uncharged, while the blue color lends vivid appeal when the rocks absorb light. ENERGY EFFICIENT - Count on these durable, weather-resistant garden decorations for energy-efficient nighttime lighting. While sunlight does the best job at charging these garden stones, this yard decor also charges via UV, LED, and fluorescent lighting. ECO FRIENDLY DESIGN - Do your part to help the environment by beautifying garden decorations with these landscaping rocks. Constructed from resin and photoluminescent pigment, these nontoxic garden stones pose no harm to humans, pets, and plants. PRODUCT DETAILS - Materials: Resin and Photoluminescent Pigment. Dimensions: Varies by Stone to Approximately (L) 0.5" to 0.8" x (W) 0.2" x (H) 0.8" to 1.2" Color: White When Uncharged; Blue When Charged.