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