Know all about Lignite and Tonalite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Tonalite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Tonalite is Phaneritic. Lignite appears Veined or Pebbled and Tonalite appears Banded and Foilated. The luster of Lignite is dull to vitreous to submetallic while that of Tonalite is subvitreous to dull. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Tonalite is available in black, brown, light to dark grey, white colors. The commercial uses of Lignite are electricity generation and that of Tonalite are cemetery markers, creating artwork.