Know all about Comendite and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Chalk belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Chalk is Clastic or Non-Clastic. Comendite appears Foliated and Chalk appears Soft. The luster of Comendite and Chalk is dull. Comendite is available in blue, bluish - grey colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Comendite are cemetery markers 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.