Know all about Greywacke and Oolite properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke and Oolite belong to Sedimentary Rocks.Texture of Greywacke is Clastic whereas that of Oolite is Clastic or Non-Clastic. Greywacke appears Dull and Oolite appears Rounded and Rough. The luster of Greywacke is dull while that of Oolite is pearly to shiny. Greywacke is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Oolite are creating artwork, jewelry, used in aquariums.