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