Mwala wa phiri lophulika (womwe umadziwika kuti pumice kapena basalt woboola) ndi chinthu chothandiza komanso choteteza chilengedwe, chomwe ndi mwala wamtengo wapatali wokhala ndi mabowo opangidwa ndi galasi la phiri lophulika, mchere, ndi thovu pambuyo pa kuphulika kwa phiri lophulika. Mwala wa phiri lophulika uli ndi mchere wambiri ndi zinthu zina monga sodium, magnesium, aluminiyamu, silicon, calcium, titaniyamu, manganese, chitsulo, nickel, cobalt, ndi molybdenum. Siwowala ndipo uli ndi mafunde amphamvu a infrared. Pambuyo pa kuphulika kwa phiri lophulika, patatha zaka masauzande ambiri, anthu akupeza kufunika kwake. Tsopano yakulitsa minda yake yogwiritsidwa ntchito m'minda monga zomangamanga, kusamalira madzi, kugaya, zipangizo zosefera, makala a barbecue, malo okongoletsa, kulima popanda dothi, ndi zinthu zokongoletsera, zomwe zimagwira ntchito yofunika kwambiri m'mafakitale osiyanasiyana.

Basalt ndi mtundu wa mwala woyambira wa volcanic, womwe ndi mtundu wa mwala wochepa kapena wopangidwa ndi thovu wopangidwa ndi magma kuchokera ku volcano pambuyo pozizira pamwamba. Ndi wa miyala ya magmatic. Kapangidwe kake ka miyala nthawi zambiri kamakhala ndi mapangidwe a m'mimba, ofanana ndi amondi, ndi porphyritic, nthawi zina ndi makristalo akuluakulu amchere. Basalt yosasinthika nthawi zambiri imakhala yakuda ndi imvi, ndipo palinso bulauni wakuda, wofiirira wakuda, ndi wobiriwira imvi.

Basalt (pumice) yokhala ndi mabowo, chifukwa cha mabowo ake ambiri komanso kuuma kwake kwakukulu, imatha kusakanizidwa ndi simenti kuti ichepetse kulemera kwake, koma ikadali yolimba ndipo ili ndi zinthu monga kutchinjiriza mawu ndi kutchinjiriza kutentha. Ndi chinthu chabwino chopangira simenti yopepuka m'nyumba zazitali. Pumice ikadali chinthu chabwino chopera, chomwe chingagwiritsidwe ntchito popera zitsulo ndi miyala; Mumakampani, ingagwiritsidwenso ntchito ngati zosefera, zowumitsira, zoyambitsa, ndi zina zotero. Matailosi a miyala yachilengedwe ya volcano lava ndi miyala ya basalt akugulitsidwa.