Volcanic stone (commonly known as pumice or porous basalt) is a very precious porous stone formed by volcanic glass, minerals and bubbles after volcanic eruption. Volcanic stone contains dozens of minerals and trace elements. It has no radiation. After the relentless volcanic eruption, it took thousands of years for human beings to discover more and more of its preciousness. Our company has expanded its application fields to construction, water conservancy, grinding, filter materials, barbecue charcoal, landscape, soilless cultivation, ornamental products and other fields.