Know all about Greywacke and Shoshonite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Shoshonite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Shoshonite is Porphyritic. Greywacke appears Dull and Shoshonite appears Dull. The luster of Greywacke and Shoshonite 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 Shoshonite is available in brown- black, dark brown colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Shoshonite are cemetery markers, creating artwork.