Lub ntiaj teb diatomaceous yog ib hom pob zeb sedimentary siliceous biogenic, feem ntau yog ua los ntawm cov seem diatom qub. Nws cov tshuaj lom neeg feem ntau yog SiO2, muaj me ntsis Al2O3, Fe2O3, CaO, MgO, K2O, Na2O, P2O5 thiab cov organic teeb meem. Cov khoom siv tseem ceeb ntawm diatomite yog cov khoom siv lim dej, cov khoom sau, cov khoom nqus dej, cov khoom nqa catalytic, cov khoom siv hauv tsev uas zoo rau ib puag ncig thiab lwm yam.