Know all about Coal and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Charnockite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Charnockite is Granular. Coal appears Veined or Pebbled and Charnockite appears Veined or Pebbled. The luster of Coal is dull to vitreous to submetallic while that of Charnockite is not available. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Charnockite is available in black, grey, orange, pink, white colors. The commercial uses of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry and that of Charnockite are curling, gemstone, laboratory bench tops, tombstones.