Diatomaceous Earth ndi mtundu wa mwala wa biogenic siliceous sedimentary, wopangidwa makamaka ndi mabwinja akale a diatom.Mankhwala ake makamaka SiO2, omwe ali ndi zochepa za Al2O3, Fe2O3, CaO, MgO, K2O, Na2O, P2O5 ndi organic matter.Zomwe zimagwiritsidwa ntchito kwambiri ndi diatomite ndi zothandizira zosefera, zodzaza, zotsatsa, zonyamula catalytic, zida zomangira zachilengedwe ndi zina zotero.