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