Know all about Siltstone and Monzonite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Monzonite belongs to Igneous Rocks.Texture of Siltstone is Clastic whereas that of Monzonite is Phaneritic. Siltstone appears Rough and Monzonite appears Shiny. The luster of Siltstone is dull while that of Monzonite is subvitreous to dull. Siltstone is available in brown, red, reddish brown colors whereas Monzonite is available in black, brown, light to dark grey, white colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Monzonite are creating artwork.