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