Know all about Greywacke and Mangerite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Mangerite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Mangerite is Phaneritic. Greywacke appears Dull and Mangerite appears Shiny. The luster of Greywacke is dull while that of Mangerite is subvitreous to dull. Greywacke and Mangerite are 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 Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Mangerite are cemetery markers, creating artwork.