Know all about Mudstone and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Mudstone and Coal belong to Sedimentary Rocks.Texture of Mudstone is Clastic whereas that of Coal is Amorphous, Glassy. Mudstone appears Rough and Dull and Coal appears Veined or Pebbled. The luster of Mudstone is dull while that of Coal is dull to vitreous to submetallic. Mudstone is available in black, blue, brown, green, grey, orange, red, white, yellow colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Mudstone are creating artwork, pottery and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.