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