Know all about Arkose and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Arkose and Siltstone belong to Sedimentary Rocks.Texture of Arkose is Clastic whereas that of Siltstone is Clastic. Arkose appears Rough and Dull and Siltstone appears Rough. The luster of Arkose and Siltstone is dull. Arkose is available in reddish brown colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.