Itshe lentaba-mlilo (elivame ukubizwa ngokuthi i-pumice noma i-basalt enezimbotshana) liyinto esebenzayo futhi evumelana nemvelo, okuyitshe eliyigugu kakhulu elinezimbotshana elakhiwe ingilazi yentaba-mlilo, amaminerali, namabhamuza ngemva kokuqhuma kwentaba-mlilo.Itshe lentaba-mlilo liqukethe inqwaba yamaminerali kanye nezakhi zokulandelela ezifana ne-sodium, i-magnesium, i-aluminium, i-silicon, i-calcium, i-titanium, i-manganese, insimbi, i-nickel, i-cobalt, ne-molybdenum.Ayinamisebe futhi inamaza kazibuthe e-infrared.Ngemva kokuqhuma kwentaba-mlilo okungenalusizo, ngemva kwamashumi ezinkulungwane zeminyaka, Abantu baya ngokuya bethola ukubaluleka kwayo.Manje isinwebe izinkambu zayo zokufaka isicelo ukuze ifinyelele emikhakheni efana nezakhiwo, ukongiwa kwamanzi, ukugaya, okokuhlunga, amalahle esoso, ukunakekelwa kwezwe, ukutshala okungenamhlaba, kanye nemikhiqizo yokuhlobisa, idlala indima engenakushintshwa ezimbonini ezihlukahlukene.

I-Basalt iwuhlobo lwedwala eliyisisekelo le-Volcanic, okuwuhlobo lwedwala elihlangene noma lesakhiwo esiyigwebu elakhiwe yi-magma evela kuntaba-mlilo ngemva kokupholisa phezulu.Ingeka-magmatic rock.Isakhiwo sayo samadwala sivame ukukhombisa izakhiwo ze-stomatal, ezifana ne-almond, kanye ne-porphyritic, ngezinye izikhathi ezinamakristalu amakhulu amaminerali.I-basalt engavuthwanga ngokuyinhloko imnyama futhi impunga, futhi kukhona nomnyama onsundu, onsomi ngokumnyama, noluhlaza ompunga.

I-basalt enezimbotshana (i-pumice), ngenxa yokuqina kwayo okuphezulu nokuqina kwayo okukhulu, ingaxutshwa nokhonkolo ukuze kuncishiswe isisindo sayo, kodwa isenamandla futhi inezici ezinjengokuvala umsindo nokushisa.Ihlanganisa kahle ukhonkolo ongasindi ezakhiweni eziphakeme.I-Pumice iseyinto enhle yokugaya, engasetshenziswa ukugaya izinto zensimbi namatshe;Embonini, ingasetshenziswa futhi njengezihlungi, okomisa, ama-catalysts, njll.Professional wemvelo we-volcanic tile tile lava kanye netshe le-basalt elithengiswayo.