Know all about Siltstone and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Borolanite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Borolanite is Granular. Siltstone appears Rough and Borolanite appears Banded and Foilated. The luster of Siltstone is dull while that of Borolanite is greasy to dull. Siltstone is available in brown, red, reddish brown colors whereas Borolanite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Borolanite are cemetery markers.