Know all about Greywacke and Diorite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Diorite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Diorite is Phaneritic. Greywacke appears Dull and Diorite appears Shiny. The luster of Greywacke is dull while that of Diorite is shiny. Greywacke and Diorite are 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 Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Diorite are creating artwork, curling.