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