Volcanic rock Pumice (commonly known as pumice or porous basalt) is a kind of functional environmental protection material. It is a very precious porous stone formed by volcanic glass, minerals and bubbles after volcanic eruption. The volcanic stone contains dozens of minerals and trace elements, such as sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt and molybdenum. It has far-infrared magnetic wave without radiation, After thousands of years, human beings have found its value more and more. Now it has been extended to the fields of construction, water conservancy, grinding, filter materials, barbecue charcoal, garden landscaping, soilless cultivation, ornamental products and so on. It plays an irreplaceable role in all walks of life! Hot rock baking back is a kind of stone therapy, which uses heated volcanic rocks to absorb negative energy of human body, help human body eliminate toxins and promote human metabolism.