Motsoako oa lik'hemik'hale oa lifaha tse phaphametseng haholo-holo ke silicon dioxide le aluminium oxide.E na le litšobotsi tse ngata tse kang likaroloana tse ntle, tse se nang letho, boima bo bobebe, matla a phahameng, ho hanyetsa ho roala, ho hanyetsa mocheso o phahameng, ho kenya mocheso oa mocheso le ho thibela lelakabe.E sebelisoa haholo ho E 'ngoe ea lisebelisoa tse tala bakeng sa indasteri ea refractory.