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