Know all about Siltstone and Shonkinite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Shonkinite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Shonkinite is Earthy. Siltstone appears Rough and Shonkinite appears Banded and Foilated. The luster of Siltstone is dull while that of Shonkinite is subvitreous to dull. Siltstone is available in brown, red, reddish brown colors whereas Shonkinite 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 Shonkinite are cemetery markers, creating artwork.