Know all about Coal and Peridotite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Peridotite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Peridotite is Phaneritic. Coal appears Veined or Pebbled and Peridotite appears Rough and Shiny. The luster of Coal is dull to vitreous to submetallic while that of Peridotite is shiny. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Peridotite is available in dark greenish - 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 Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.