Know all about Coal and Serpentinite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Serpentinite belongs to Metamorphic Rocks.Texture of Coal is Amorphous, Glassy whereas that of Serpentinite is Earthy. Coal appears Veined or Pebbled and Serpentinite appears Rough and Dull. The luster of Coal is dull to vitreous to submetallic while that of Serpentinite is waxy and dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Serpentinite is available in black, brown, colourless, green, grey, 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 Serpentinite are commemorative tablets, creating artwork.