Know all about Trachyandesite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Trachyandesite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Greywacke is Clastic. Trachyandesite appears Dull and Soft and Greywacke appears Dull. The luster of Trachyandesite is earthy while that of Greywacke is dull. Trachyandesite is available in black, brown, light to dark 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 Trachyandesite are creating artwork, pottery and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.