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