Know all about Siltstone and Conglomerate properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone and Conglomerate belong to Sedimentary Rocks.Texture of Siltstone is Clastic whereas that of Conglomerate is Clastic. Siltstone appears Rough and Conglomerate appears Shiny and Rounded. The luster of Siltstone and Conglomerate is dull. Siltstone is available in brown, red, reddish brown colors whereas Conglomerate is available in beige, black, brown, buff, light to dark grey, orange, rust, white, yellow colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Conglomerate are cemetery markers, in aquifers, tombstones.