Know all about Chalk and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Borolanite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Borolanite is Granular. Chalk appears Soft and Borolanite appears Banded and Foilated. The luster of Chalk is dull while that of Borolanite is greasy to dull. Chalk is available in grey, white, yellow colors whereas Borolanite is available in brown, buff, cream, green, grey, pink, white 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 Borolanite are cemetery markers.