Know all about Argillite and Luxullianite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Luxullianite belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Luxullianite is Granular, Phaneritic. Argillite appears Rough and Dull and Luxullianite appears Veined or Pebbled. The luster of Argillite is waxy and dull while that of Luxullianite is dull to grainy with sporadic parts pearly and vitreous. Argillite is available in dark grey to black, pink, red, white colors whereas Luxullianite is available in black, grey, orange, pink, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Luxullianite are creating artwork, curling, gemstone, laboratory bench tops, tombstones.