Know all about Argillite and Diatomite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite and Diatomite belong to Sedimentary Rocks.Texture of Argillite is Clastic, Polished whereas that of Diatomite is Clastic or Non-Clastic. Argillite appears Rough and Dull and Diatomite appears Soft. The luster of Argillite is waxy and dull while that of Diatomite is dull. Argillite is available in dark grey to black, pink, red, white colors whereas Diatomite is available in grey, white, yellow colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends 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.