This crystal stone is especially helpful in improving the living environment. It can be used for fish tank and aquariums to offer fish a comfortable living environment and improve the visual enjoyment. Moreover, it is decoration for your home or office. You can put it in the bag or beside TV, computer, etc. It is also great for DIY crafts. Features - Color: Random. - Material: Stone. - Size: About 1.5x1x1 cm. - Every gravel is unique and natural. This chips stones are good for home indoor decoration, scene setting, fish tank, flowerpots, air plants, plant bedding to boost your energy and other craft projects. - Add nice decoration to fish tank, vase, flowerpot, aquarium, etc,improve the visual enjoyment for any place. - Suitable for both fresh and salt water, beautiful and easy for daily washing. - If applied to the fish tank, these could decompose the fish poop and prevent the it from flowing in the water. Most importantly they could purify water. If applied to the flowerpots, these could reduce the splashing water when watering the flowers. Best decorative soil substitute for indoor plants. - The crystal stones are also great for DIY crafts.