Know all about Siltstone and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone and Diatomite belong to Sedimentary Rocks.Texture of Siltstone is Clastic whereas that of Diatomite is Clastic or Non-Clastic. Siltstone appears Rough and Diatomite appears Soft. The luster of Siltstone and Diatomite is dull. Siltstone is available in brown, red, reddish brown colors whereas Diatomite is available in grey, white, yellow colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner 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.