Know all about Comendite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Greywacke is Clastic. Comendite appears Foliated and Greywacke appears Dull. The luster of Comendite and Greywacke is dull. Comendite is available in blue, bluish - grey 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 Comendite are cemetery markers and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.