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