Know all about Coal and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Coal is Amorphous, Glassy whereas that of Mylonite is Foliated. Coal appears Veined or Pebbled and Mylonite appears Dull, Banded and Foilated. The luster of Coal is dull to vitreous to submetallic while that of Mylonite is shiny. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Mylonite is available in black to grey 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 Mylonite are creating artwork, gemstone, jewelry.