Know all about Lignite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Lignite and Siltstone belong to Sedimentary Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Siltstone is Clastic. Lignite appears Veined or Pebbled and Siltstone appears Rough. The luster of Lignite is dull to vitreous to submetallic while that of Siltstone is dull. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Lignite are electricity generation and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.