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