Know all about Diorite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Diorite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Diorite is Phaneritic whereas that of Chalk is Clastic or Non-Clastic. Diorite appears Shiny and Chalk appears Soft. The luster of Diorite is shiny while that of Chalk is dull. Diorite is available in black, brown, light to dark grey, white colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Diorite are creating artwork, curling 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.