Dhulka Diatomaceous waa nooc ka mid ah dhagaxa sedimentary siliceous biogenic, inta badan ka kooban hadhaaga diatom qadiimiga ah.Halabuurka kiimikaad inta badan waa SiO2, oo ka kooban qadar yar oo Al₂O₃, Fe₂O₃, CaO, MgO, K₂O, Na₂O, P₂O₅iyo walxaha organic.Isticmaalka ugu muhiimsan ee diatomite waa qalabka shaandhada, buuxinta, adsorbents, sideyaasha catalytic, qalabka dhismaha ee deegaanka u fiican iyo wixii la mid ah.