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