Know all about Coal and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Borolanite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Borolanite is Granular. Coal appears Veined or Pebbled and Borolanite appears Banded and Foilated. The luster of Coal is dull to vitreous to submetallic while that of Borolanite is greasy to dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Borolanite is available in brown, buff, cream, green, grey, 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 Borolanite are cemetery markers.