Know all about Greywacke and Ignimbrite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Ignimbrite belongs to Igneous Rocks.Texture of Greywacke is Clastic whereas that of Ignimbrite is Aphanitic. Greywacke appears Dull and Ignimbrite appears Dull, Vesicular and Foilated. The luster of Greywacke is dull while that of Ignimbrite is vitreous to dull. Greywacke and Ignimbrite 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 Ignimbrite are cemetery markers, commemorative tablets, creating artwork.