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