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