Know all about Siltstone and Norite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Norite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Norite is Phaneritic. Siltstone appears Rough and Norite appears Veined and Shiny. The luster of Siltstone is dull while that of Norite is not available. Siltstone is available in brown, red, reddish brown colors whereas Norite is available in dark grey to black colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Norite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.