Know all about Siltstone and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Siltstone belongs to Sedimentary Rocks while Granulite belongs to Metamorphic Rocks.Texture of Siltstone is Clastic whereas that of Granulite is Granoblastic. Siltstone appears Rough and Granulite appears Veined or Pebbled. The luster of Siltstone is dull while that of Granulite is vitreous. Siltstone is available in brown, red, reddish brown colors whereas Granulite is available in black, brown colors. The commercial uses of Siltstone are raw material for the manufacture of mortar, soil conditioner and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.