Know all about Lignite and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Lignite appears Veined or Pebbled and Trachyandesite appears Dull and Soft. The luster of Lignite is dull to vitreous to submetallic while that of Trachyandesite is earthy. Lignite and Trachyandesite are available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Lignite are electricity generation and that of Trachyandesite are creating artwork, pottery.