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