Know all about Greywacke and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke and Greywacke belong to Sedimentary Rocks.Texture of Greywacke is Clastic whereas that of Greywacke is Clastic. Greywacke appears Dull and Greywacke appears Dull. The luster of Greywacke and Greywacke is dull. Greywacke and Greywacke 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 and Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.