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