Volcanic pob zeb Pumice (feem ntau hu ua pumice lossis porous basalt) yog ib yam khoom siv tiv thaiv ib puag ncig.Nws yog ib lub pob zeb uas muaj nqi heev uas tsim los ntawm volcanic iav, cov zaub mov thiab npuas tom qab volcanic eruption.Lub pob zeb volcanic muaj ntau ntau cov zaub mov thiab kab kawm, xws li sodium, magnesium, aluminium, silicon, calcium, titanium, manganese, hlau, npib tsib xee, cobalt thiab molybdenum.Nws muaj nyob deb-infrared magnetic yoj yam tsis muaj hluav taws xob, Tom qab ntau txhiab xyoo, tib neeg tau pom nws tus nqi ntau dua.Tam sim no nws tau txuas ntxiv mus rau thaj chaw ntawm kev tsim kho, kev txuag dej, kev sib tsoo, cov ntaub ntawv lim, barbecue charcoal, vaj tsev kho kom zoo nkauj, kev cog qoob loo tsis muaj av, khoom siv ornamental thiab lwm yam.Nws ua lub luag haujlwm tsis tuaj yeem hloov pauv hauv txhua qhov chaw ntawm lub neej!Cov pob zeb kub ci rov qab yog ib hom kev kho pob zeb, uas siv cov pob zeb kub volcanic kom nqus tau lub zog tsis zoo ntawm tib neeg lub cev, pab tib neeg lub cev tshem tawm cov co toxins thiab txhawb tib neeg cov metabolism.