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