Know all about Mylonite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite belongs to Metamorphic Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Mylonite is Foliated whereas that of Siltstone is Clastic. Mylonite appears Dull, Banded and Foilated and Siltstone appears Rough. The luster of Mylonite is shiny while that of Siltstone is dull. Mylonite is available in black to grey colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.