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