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