Know all about Greywacke and Arkose properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke and Arkose belong to Sedimentary Rocks.Texture of Greywacke is Clastic whereas that of Arkose is Clastic. Greywacke appears Dull and Arkose appears Rough and Dull. The luster of Greywacke and Arkose is dull. 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 Arkose is available in reddish brown colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones.