Know all about Greywacke and Teschenite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Teschenite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Teschenite is Phaneritic. Greywacke appears Dull and Teschenite appears Veined and Shiny. The luster of Greywacke is dull while that of Teschenite is not available. 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 Teschenite is available in dark grey to black colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Teschenite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.