Know all about Phyllite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Phyllite belongs to Metamorphic Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Phyllite is Phyllitic Sheen, Slaty whereas that of Siltstone is Clastic. Phyllite appears Crinkled or Wavy and Siltstone appears Rough. The luster of Phyllite is phyllitic while that of Siltstone is dull. Phyllite is available in black to grey, light greenish grey colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Phyllite are cemetery markers, commemorative tablets, creating artwork, writing slates and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.