Know all about Lignite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Lignite and Greywacke belong to Sedimentary Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Greywacke is Clastic. Lignite appears Veined or Pebbled and Greywacke appears Dull. The luster of Lignite is dull to vitreous to submetallic while that of Greywacke is dull. Lignite is available in black, brown, dark brown, grey, 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 Lignite are electricity generation and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.