Know all about Coal and Adamellite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Adamellite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Adamellite is Porphyritic. Coal appears Veined or Pebbled and Adamellite appears Veined or Pebbled. The luster of Coal is dull to vitreous to submetallic while that of Adamellite is dull to grainy with sporadic parts pearly and vitreous. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Adamellite 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 Adamellite are curling, gemstone, laboratory bench tops, tombstones.