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