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