Pob zeb tawg Pumice (feem ntau hu ua pumice lossis porous basalt) yog ib hom khoom siv tiv thaiv ib puag ncig. Nws yog ib lub pob zeb muaj nqis heev uas tsim los ntawm cov iav tawg, cov zaub mov thiab cov npuas tom qab tawg ntawm roob hluav taws. Lub pob zeb tawg muaj ntau yam zaub mov thiab cov ntsiab lus me me, xws li sodium, magnesium, txhuas, silicon, calcium, titanium, manganese, hlau, nickel, cobalt thiab molybdenum. Nws muaj nthwv dej sib nqus deb-infrared tsis muaj hluav taws xob, Tom qab ntau txhiab xyoo, tib neeg tau pom nws tus nqi ntau dua. Tam sim no nws tau nthuav dav mus rau thaj chaw ntawm kev tsim kho, kev txuag dej, kev sib tsoo, cov ntaub ntawv lim dej, cov thee barbecue, kev ua vaj, kev cog qoob loo tsis muaj av, cov khoom dai kom zoo nkauj thiab lwm yam. Nws ua lub luag haujlwm tseem ceeb hauv txhua qhov chaw ntawm lub neej! Pob zeb kub ci rov qab yog ib hom kev kho pob zeb, uas siv cov pob zeb tawg kub los nqus lub zog tsis zoo ntawm tib neeg lub cev, pab tib neeg lub cev tshem tawm cov tshuaj lom thiab txhawb kev ua haujlwm ntawm tib neeg.