Know all about Coal and Conglomerate properties here. All properties of rocks are important as they define the type of rock and its application. Coal and Conglomerate belong to Sedimentary Rocks.Texture of Coal is Amorphous, Glassy whereas that of Conglomerate is Clastic. Coal appears Veined or Pebbled and Conglomerate appears Shiny and Rounded. The luster of Coal is dull to vitreous to submetallic while that of Conglomerate is dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Conglomerate is available in beige, black, brown, buff, light to dark grey, orange, rust, white, yellow 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 Conglomerate are cemetery markers, in aquifers, tombstones.