Know all about Lignite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Pseudotachylite is Quench. Lignite appears Veined or Pebbled and Pseudotachylite appears Dull and Soft. The luster of Lignite is dull to vitreous to submetallic while that of Pseudotachylite is vitreous. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Lignite are electricity generation and that of Pseudotachylite are creating artwork, gemstone.