Know all about Siltstone and Sandstone properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone and Sandstone belong to Sedimentary Rocks.Texture of Siltstone is Clastic whereas that of Sandstone is Clastic, Granular, Rough. Siltstone appears Rough and Sandstone appears Rough. The luster of Siltstone and Sandstone is dull. Siltstone is available in brown, red, reddish brown colors whereas Sandstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Sandstone are an oil and gas reservoir, in aquifers, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones, used in aquariums.