Know all about Dunite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Dunite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Dunite is Phaneritic whereas that of Greywacke is Clastic. Dunite appears Rough and Shiny and Greywacke appears Dull. The luster of Dunite is shiny while that of Greywacke is dull. Dunite is available in dark greenish - grey 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 Dunite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.