Know all about Chalk and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Chalk belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Chalk is Clastic or Non-Clastic whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Chalk appears Soft and Trachyandesite appears Dull and Soft. The luster of Chalk is dull while that of Trachyandesite is earthy. Chalk is available in grey, white, yellow colors whereas Trachyandesite is available in black, brown, light to dark grey 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 Trachyandesite are creating artwork, pottery.