Know all about Claystone and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Claystone and Greywacke belong to Sedimentary Rocks.Texture of Claystone is Clastic whereas that of Greywacke is Clastic. Claystone appears Rough and Dull and Greywacke appears Dull. The luster of Claystone and Greywacke is dull. Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Greywacke is 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 Claystone are pottery and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.