Nkume lava / mgbawa ugwu (nke a na-akpọkarị pumice ma ọ bụ basalt porous) bụ porous dị oke ọnụ ahịa yana ụdị nkume nchebe gburugburu ebe obibi na-arụ ọrụ site na iko mgbawa ugwu, mineral na afụ mgbe mgbawa ugwu.Ọ nwere ọtụtụ pores, ịdị arọ dị arọ, ike dị elu na mkpuchi ọkụ.
Ọ bụ ụdị nkume dị oké ọnụ ahịa na nke polyporous, nke sitere na iko mgbawa ugwu, ịnweta na ikuku ikuku na usoro mgbawa ugwu.
O nwere sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt, molybdenum, na ọtụtụ mineral na ihe ndị ọzọ.
O nweghị radieshon.
Ọ nwere anya infrared magnetik ife, Natural amị n'ọnwa elu nkume.
Ihe akaebe slide, acid na alkali.
Ịkwado ụda na mkpuchi.