These small slate stones are very dusty and will need to be rinsed before use. 2 pounds of Capcouriers Slate Stones ( Approximately 15 to 20 rocks ). Perfect stones for building habitat rock formations. Slate rocks range between 1 to 2 inches. Assorted size and shape stones. THE TRUSTED BRAND: Capcouriers is proud to supply the highest quality products on the market, backed by excellent customer service.