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