Know all about Essexite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Essexite belongs to Igneous Rocks while Greywacke belongs to Sedimentary Rocks.Texture of Essexite is Granular whereas that of Greywacke is Clastic. Essexite appears Banded and Greywacke appears Dull. The luster of Essexite is not available while that of Greywacke is dull. Essexite is available in dark grey to black 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 Essexite are cemetery markers, commemorative tablets, jewelry, sea defence, tombstones and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.