Know all about Greywacke and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Mylonite is Foliated. Greywacke appears Dull and Mylonite appears Dull, Banded and Foilated. The luster of Greywacke is dull while that of Mylonite is shiny. 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 Mylonite is available in black to grey colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Mylonite are creating artwork, gemstone, jewelry.