Nkume mgbawa ugwu (nke a na-akpọkarị pumice ma ọ bụ basalt porous) bụ ihe na-arụ ọrụ na gburugburu ebe obibi, nke bụ nkume porous dị oke ọnụ ahịa nke iko mgbawa ugwu, mineral, na afụ kpụrụ mgbe mgbawa ugwu.Nkume mgbawa ugwu nwere ọtụtụ mineral na ihe ndị dị ka sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt, na molybdenum.Ọ na-adịghị radiative ma nwee tere-infrared magnetik ebili mmiri.Mgbe mgbawa ugwu na-enweghị obi ebere gasịrị, ka ọtụtụ iri puku afọ gasịrị, ụmụ mmadụ na-achọpụtawanye uru ọ bara.Ugbu a, ọ gbasaala mpaghara ngwa ya gaa n'ubi dị ka ihe owuwu ụlọ, nchekwa mmiri, egweri, ihe nzacha, unyi barbecue, nhazi ala, ịkọ ahịhịa na-adịghị ala, na ngwaahịa ịchọ mma, na-arụ ọrụ na-enweghị atụ n'ụlọ ọrụ dị iche iche.

Basalt bụ ụdị nkume mgbawa mgbawa, nke bụ ụdị kọmpat ma ọ bụ ihe nrụnye ụfụfụ nke magma sitere na ugwu mgbawa na-eme ka ọ dị jụụ n'elu.Ọ bụ nke nkume magmatic.Ọdịdị nkume ya na-egosipụtakarị stomatal, almond like, na ihe owuwu porphyritic, mgbe ụfọdụ nwere nnukwu kristal ịnweta.Baslt na-adịghị ahụkebe na-abụkarị oji na isi awọ, ma e nwekwara oji agba aja aja, odo odo, na akwụkwọ ndụ akwụkwọ ndụ grayish.

Porous basalt (pumice), n'ihi nnukwu porosity ya na nnukwu ike siri ike, enwere ike ịgwakọta ya na kọmpụta iji belata ibu ya, mana ọ ka siri ike ma nwee njirimara dịka mkpuchi ụda na mkpuchi ọkụ.Ọ bụ mkpokọta dị mma maka kọmpụta dị fechaa n'ime ụlọ ndị dị elu.Pumice ka bụ ihe na-egweri nke ọma, nke enwere ike iji ígwè na nkume mee ihe;Na ụlọ ọrụ, ọ nwekwara ike-eji dị ka nzacha, dryers, catalysts, wdg. Ọkachamara eke mgbawa ugwu nkume tiles lava na basalt nkume maka ire ere.