Know all about Argillite and Trachyte properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Trachyte belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Trachyte is Aphanitic to Porphyritic. Argillite appears Rough and Dull and Trachyte appears Banded. The luster of Argillite is waxy and dull while that of Trachyte is metallic. Argillite is available in dark grey to black, pink, red, white colors whereas Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Trachyte are cemetery markers, creating artwork.