The Kaiyuan Dynasty Glow in The Dark Rocks 300Pcs Blue Glow Stones, Glowing Rocks for Betta Fish Tank, Aquarium, Garden, Planters, Landscaping Pathway Glow Gravel Pebbles Decorations is perfect for any home. Made of high-quality resin, these rocks are durable and long-lasting. With a vivid blue color, they are sure to catch anyone’s eye.