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