Know all about Arkose and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Arkose and Coal belong to Sedimentary Rocks.Texture of Arkose is Clastic whereas that of Coal is Amorphous, Glassy. Arkose appears Rough and Dull and Coal appears Veined or Pebbled. The luster of Arkose is dull while that of Coal is dull to vitreous to submetallic. Arkose is available in reddish brown colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.