Umhlaba we-Diatomaceous luhlobo lwe-biogenic siliceous sedimentary rock, ikakhulu eyenziwe ziintsalela zediatom zakudala.Ukubunjwa kwayo kweekhemikhali ikakhulu yiSiO2, equkethe inani elincinci le-Al₂O₃, Fe₂O₃, CaO, MgO, K₂Kwi₂O, P₂O₅kunye nezinto eziphilayo.Ukusetyenziswa okuphambili kwe-diatomite zizixhobo zokucoca, iifayili, ii-adsorbents, abathwali be-catalytic, izinto zokwakha ezinobume bendalo kunye nokunye.