Know all about Lignite and Oil shale properties here. All properties of rocks are important as they define the type of rock and its application. Lignite and Oil shale belong to Sedimentary Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Oil shale is Splintery. Lignite appears Veined or Pebbled and Oil shale appears Muddy. The luster of Lignite is dull to vitreous to submetallic while that of Oil shale is dull. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Oil shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Lignite are electricity generation and that of Oil shale are an oil and gas reservoir.