Collections Etc 100 PC Glow in The Dark Pebbles for Garden, Walkways, Fish Tank/Aquarium Decor, Green Stones soak up the light during the day and glow in the dark at night Scatter these stones along a pathway, in a garden, potted plant, or fish tank aquarium Set includes 100 decorative stones in different shapes Made from polystyrene. Each stone measures approximately 1" diameter Shop with confidence! For over 50 years, Collections Etc has been bringing unique, whimsical, inspirational, and home solution products to customers. All Collections Etc products come with a 60 day, easy return policy and 100% satisfaction guarantee