Know all about Chalk and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk and Diatomite belong to Sedimentary Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Diatomite is Clastic or Non-Clastic. Chalk appears Soft and Diatomite appears Soft. The luster of Chalk and Diatomite is dull. Chalk and Diatomite are available in grey, white, yellow colors. The commercial uses of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper and that of Diatomite 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.