Know all about Greywacke and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Granulite belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Granulite is Granoblastic. Greywacke appears Dull and Granulite appears Veined or Pebbled. The luster of Greywacke is dull while that of Granulite is vitreous. Greywacke and Granulite 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 Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.