Know all about Lignite and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Troctolite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Troctolite is Phaneritic. Lignite appears Veined or Pebbled and Troctolite appears Veined and Shiny. The luster of Lignite is dull to vitreous to submetallic while that of Troctolite is not available. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Troctolite is available in dark grey to black colors. The commercial uses of Lignite are electricity generation and that of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.