Know all about Lignite and Rapakivi 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 Rapakivi Granite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Rapakivi Granite is Granular, Phaneritic. Lignite appears Veined or Pebbled and Rapakivi Granite appears Veined or Pebbled. The luster of Lignite is dull to vitreous to submetallic while that of Rapakivi 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 Rapakivi Granite is available in black, grey, orange, pink, white colors. The commercial uses of Lignite are electricity generation and that of Rapakivi Granite are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, tombstones.