Know all about Diatomite and Coquina properties here. All properties of rocks are important as they define the type of rock and its application. Diatomite and Coquina belong to Sedimentary Rocks.Texture of Diatomite is Clastic or Non-Clastic whereas that of Coquina is Clastic. Diatomite appears Soft and Coquina appears Layered, Banded, Veined and Shiny. The luster of Diatomite is dull while that of Coquina is dull to vitreous to submetallic. Diatomite is available in grey, white, yellow colors whereas Coquina is available in beige, buff, orange colors. The commercial uses of Diatomite and Coquina are alumina refineries, animal feed filler, as a feed additive for livestock, creating artwork, drawing on blackboards, fire resistant, gymnasts, athletes and mountain climbers use for grip, in aquifers, soil conditioner, to ignite fire, used as a filter medium, used as an insecticide, whiting material in toothpaste, paint and paper.