Know all about Greywacke and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Charnockite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Charnockite is Granular. Greywacke appears Dull and Charnockite appears Veined or Pebbled. The luster of Greywacke is dull while that of Charnockite is not available. 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 Charnockite 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 Charnockite are curling, gemstone, laboratory bench tops, tombstones.