Duniyar Diatomaceous wani nau'in dutse ne mai siliceous sedimentary, wanda galibi ya ƙunshi tsoffin ragowar diatom. Sinadarin sinadaransa galibi SiO2 ne, wanda ke ɗauke da ƙaramin adadin Al2O3, Fe2O3, CaO, MgO, K2O, Na2O, P2O5 da ma'adanai na halitta. Babban amfani da diatomite shine matattarar tacewa, abubuwan cikawa, masu shaye-shaye, masu ɗaukar kaya masu kaifi, kayan gini masu lafiya ga muhalli da sauransu.