Know all about Greywacke and Monzonite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Monzonite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Monzonite is Phaneritic. Greywacke appears Dull and Monzonite appears Shiny. The luster of Greywacke is dull while that of Monzonite is subvitreous to dull. Greywacke and Monzonite 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 Monzonite are creating artwork.