Paglalarawan: Ang bulkan na bato na karaniwang kilala bilang pumice o porous basalt, ito ay isang uri ng functional at environmental material.Naglalaman ito ng dose-dosenang mineral at microelement, tulad ng sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt at molibdenum at iba pa.

Paggamit: construction, water conservancy, grinding, filter material, barbecuecarbon, landscape architecture, soilless cultivation, ornamental products at iba pang field.

Kulay: pula, itim. puti
laki: 3-6mm,6-8mm,8-10mm,1-3cm,3-6cm,6-8cm,8-10cm,10-50cm ay maaaring i-customize.style: bato, particle, powder.