Ko te oneone diatomaceous he momo toka parataiao siliceous koiora, he mea hanga te nuinga mai i ngā toenga diatom tawhito. Ko tōna hanganga matū ko te SiO2, kei roto he iti noa te Al.₂O₃, Fe₂O₃, CaO, MgO, K₂Ā, Nā₂Ō, P₂O₅me ngā mea rauropi. Ko ngā whakamahinga matua o te diatomite he āwhina tātari, he whakakī, he mimiti, he kawe whakatere, he rauemi hanga taiao, me ērā atu mea.