Know all about Lignite and Aplite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Aplite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Aplite is Granular, Graphic. Lignite appears Veined or Pebbled and Aplite appears Veined or Pebbled. The luster of Lignite is dull to vitreous to submetallic while that of Aplite is dull to pearly to subvitreous. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Aplite is available in black, grey, orange, pink, white colors. The commercial uses of Lignite are electricity generation and that of Aplite are curling, gemstone, laboratory bench tops, small sculptures, tombstones.