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