Know all about Greywacke and Luxullianite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Luxullianite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Luxullianite is Granular, Phaneritic. Greywacke appears Dull and Luxullianite appears Veined or Pebbled. The luster of Greywacke is dull while that of Luxullianite is dull to grainy with sporadic parts pearly and vitreous. Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Luxullianite is available in black, grey, orange, pink, white colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Luxullianite are creating artwork, curling, gemstone, laboratory bench tops, tombstones.