Know all about Greywacke and Schist properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Schist belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Schist is Foliated, Platy. Greywacke appears Dull and Schist appears Layered and Shiny. The luster of Greywacke is dull while that of Schist 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 Schist is available in black, blue, brown, dark brown, green, grey, silver colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Schist are used in aquariums, writing slates.