This product consists of polished black stones. Each bag contains about 1 - 2 stones weighing 15lb in total, covering approximately 3.42 sq ft. These stones are made of natural cobblestone, being strong, wear - resistant, and corrosion - resistant. They are smooth and softly tumbled, and free from any dyes or harmful materials. They can be used in various scenarios. In gardening, they help improve drainage and air circulation, retain soil moisture, and prevent soil erosion, making them perfect for large potted planters, bamboo plants, and both indoor and outdoor gardens. They can also be used in garden buildings, forest trails, and around swimming pools. Moreover, they serve as decorative elements for home decor, like being scattered around pillar candles in hurricane glass or placed on coffee tables. With a 15lb package, you can get a large quantity at a cost - effective price.