Know all about Coal and Wehrlite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Wehrlite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Wehrlite is Banded. Coal appears Veined or Pebbled and Wehrlite appears Rough and Banded. The luster of Coal is dull to vitreous to submetallic while that of Wehrlite is metallic. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Wehrlite is available in dark greenish - grey, green 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 Wehrlite are cemetery markers, creating artwork, gemstone, jewelry.