Know all about Andesite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Andesite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Greywacke is Clastic. Andesite appears Dull and Soft and Greywacke appears Dull. The luster of Andesite is vitreous while that of Greywacke is dull. Andesite is available in bluish - grey, grey, pink, yellow 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 Andesite are commemorative tablets, creating artwork and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.