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