Know all about Lignite and Gritstone properties here. All properties of rocks are important as they define the type of rock and its application. Lignite and Gritstone belong to Sedimentary Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Gritstone is Earthy. Lignite appears Veined or Pebbled and Gritstone appears Layered and Foliated. The luster of Lignite is dull to vitreous to submetallic while that of Gritstone is dull. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Gritstone 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 Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones.