Know all about Greywacke and Basanite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Basanite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Basanite is Aphanitic to Porphyritic. Greywacke appears Dull and Basanite appears Glassy or Pearly. The luster of Greywacke is dull while that of Basanite is waxy and dull. Greywacke and Basanite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Basanite are as a touchstone, creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.