Mwala wa Lava / Volcanic (womwe umadziwika kuti pumice kapena porous basalt) ndi wamtengo wapatali kwambiri komanso mwala woteteza zachilengedwe wopangidwa ndi magalasi ophulika, mchere ndi thovu pambuyo pa kuphulika kwa chiphalaphala.Ili ndi pores ambiri, kulemera kopepuka, mphamvu yayikulu komanso kutchinjiriza kwamafuta.
Ndi mwala wamtengo wapatali komanso wa polyporous, womwe umapangidwa ndi galasi lamoto, mchere ndi mpweya wa mpweya panthawi ya kuphulika kwa chiphalaphala.
Lili ndi sodium, magnesium, aluminium, silicon, calcium, titaniyamu, manganese, chitsulo, faifi tambala, cobalt, molybdenum, ndi ena ambiri a mchere ndi kufufuza zinthu.
Ilibe ma radiation.
Ili ndi maginito a infrared maginito, Mwala wachilengedwe wa mwezi.
Umboni wa slide, asidi ndi alkali.
Kutulutsa mawu komanso kutsekereza.