Know all about Coal and Travertine properties here. All properties of rocks are important as they define the type of rock and its application. Coal and Travertine belong to Sedimentary Rocks.Texture of Coal is Amorphous, Glassy whereas that of Travertine is Banded. Coal appears Veined or Pebbled and Travertine appears Fibrous. The luster of Coal is dull to vitreous to submetallic while that of Travertine is dull to pearly. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Travertine is available in beige, black, blue, brown, grey, red, white, yellow 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 Travertine are cemetery markers, creating artwork, gemstone, jewelry, paper industry, pottery.