Know all about Comendite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Siltstone is Clastic. Comendite appears Foliated and Siltstone appears Rough. The luster of Comendite and Siltstone is dull. Comendite is available in blue, bluish - grey colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Comendite are cemetery markers and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.