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