Know all about Trachyandesite and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite belongs to Igneous Rocks while Argillite belongs to Sedimentary Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Argillite is Clastic, Polished. Trachyandesite appears Dull and Soft and Argillite appears Rough and Dull. The luster of Trachyandesite is earthy while that of Argillite is waxy and dull. Trachyandesite is available in black, brown, light to dark grey colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Trachyandesite are creating artwork, pottery and that of Argillite are fire resistant, used to manufracture paperweights and bookends.