Know all about Granite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Granite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Granite is Granular, Phaneritic whereas that of Siltstone is Clastic. Granite appears Veined or Pebbled and Siltstone appears Rough. The luster of Granite is dull to grainy with sporadic parts pearly and vitreous while that of Siltstone is dull. Granite is available in black, grey, orange, pink, white colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Granite are curling, gemstone, laboratory bench tops, tombstones, used in aquariums and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.