Know all about Greywacke and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Troctolite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Troctolite is Phaneritic. Greywacke appears Dull and Troctolite appears Veined and Shiny. The luster of Greywacke is dull while that of Troctolite 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 Troctolite 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 Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.