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