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