Know all about Claystone and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Claystone and Chalk belong to Sedimentary Rocks.Texture of Claystone is Clastic whereas that of Chalk is Clastic or Non-Clastic. Claystone appears Rough and Dull and Chalk appears Soft. The luster of Claystone and Chalk is dull. Claystone and Chalk are available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Claystone are pottery 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.