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