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