Know all about Lignite and Adakite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Adakite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Adakite is Porphyritic. Lignite appears Veined or Pebbled and Adakite appears Dull and Soft. The luster of Lignite is dull to vitreous to submetallic while that of Adakite is grainy, pearly and vitreous. Lignite and Adakite are available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Lignite are electricity generation and that of Adakite are commemorative tablets, pottery, used in aquariums.