Know all about Lignite and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Hornfels belongs to Metamorphic Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Hornfels is Granular, Platy. Lignite appears Veined or Pebbled and Hornfels appears Dull. The luster of Lignite is dull to vitreous to submetallic while that of Hornfels is shiny. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. The commercial uses of Lignite are electricity generation and that of Hornfels are cemetery markers, commemorative tablets, creating artwork.