Know all about Coal and Chert properties here. All properties of rocks are important as they define the type of rock and its application. Coal and Chert belong to Sedimentary Rocks.Texture of Coal is Amorphous, Glassy whereas that of Chert is Banded, Rough. Coal appears Veined or Pebbled and Chert appears Glassy or Pearly. The luster of Coal is dull to vitreous to submetallic while that of Chert is waxy and dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Chert is available in black, brown, green, grey, red, 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 Chert are creating artwork, gemstone, in fire-starting tools, jewelry, to ignite fire, used in flintlock firearms.