Lava pob zeb / Volcanic pob zeb (feem ntau hu ua pumice los yog porous basalt) yog ib qho tseem ceeb heev ntxeem tau thiab ua haujlwm zoo ntawm ib puag ncig tiv thaiv pob zeb tsim los ntawm volcanic iav, minerals thiab npuas tom qab volcanic eruption.Nws muaj ntau qhov pores, lub teeb yuag, siab zog thiab thermal rwb thaiv tsev.
Nws yog ib hom pob zeb muaj nuj nqis thiab polyporous, thiab tsim los ntawm volcanic iav, ntxhia thiab huab cua npuas nyob rau hauv tus txheej txheem ntawm volcanic eruption.
Nws muaj sodium, magnesium, txhuas, silicon, calcium, titanium, manganese, hlau, npib tsib xee, cobalt, molybdenum, thiab ntau ntau cov zaub mov thiab kab kawm.
Nws tsis muaj hluav taws xob.
Nws muaj deb infrared magnetic yoj, Ntuj lunar nto pob zeb.
Swb-pov thawj, acid & alkali pov thawj.
Suab absorbing thiab rwb thaiv tsev.