Know all about Coal and Blue Granite properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Blue Granite belongs to Igneous Rocks.Texture of Coal is Amorphous, Glassy whereas that of Blue Granite is Phaneritic. Coal appears Veined or Pebbled and Blue Granite appears Shiny. The luster of Coal is dull to vitreous to submetallic while that of Blue Granite is subvitreous to dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Blue Granite is available in black, brown, light to dark 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 Blue Granite are cemetery markers, commemorative tablets, creating artwork, curling.