Know all about Lignite and Nephelinite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Nephelinite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Nephelinite is Aphanitic. Lignite appears Veined or Pebbled and Nephelinite appears Skeletal. The luster of Lignite is dull to vitreous to submetallic while that of Nephelinite is vitreous to metallic. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Nephelinite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Lignite are electricity generation and that of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo).