Know all about Shale and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Shale and Siltstone belong to Sedimentary Rocks.Texture of Shale is Clastic, Splintery whereas that of Siltstone is Clastic. Shale appears Muddy and Siltstone appears Rough. The luster of Shale and Siltstone is dull. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Shale are creating artwork, pottery and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.