Natural slate stones,due to nature, this stones are different. The shape has a large and small, thick and thin. Use for walkways, water features, ponds,exposed aggregate flooring or walls and many other areas. Also applicable rock painting and stone carving. Add natural uniqueness and interest to the stones. Our stones are hand picked, inspected, washed. They can be glued together with aquarium safe glue to create caves, cliffs and mountain ranges for fish and plants. Real slate stone will enhance the beauty and realism of your creations. If you have any questions, feel free to contact us! Guarantee a full refund if you are not satisfied with our products.