Volcanic stone is a functional kind of environmental protection material.
It is a kind of precious and polyporous stone, and formed by volcanic glass ,mineral and air bubble in the process of volcanic eruption.
It contains sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt, molybdenum, and other dozens of minerals and trace elements.
It has no radiation .It has far infrared magnetic wave ,can be used for Slide-proof, acid & alkali proof ,Sound absorbing and
insulation ;
