Know all about Coal and Blueschist properties here. All properties of rocks are important as they define the type of rock and its application. Coal belongs to Sedimentary Rocks while Blueschist belongs to Metamorphic Rocks.Texture of Coal is Amorphous, Glassy whereas that of Blueschist is Foliated. Coal appears Veined or Pebbled and Blueschist appears Dull and Banded. The luster of Coal is dull to vitreous to submetallic while that of Blueschist is dull. Coal is available in black, brown, dark brown, grey, light to dark grey colors whereas Blueschist is available in blue, bluish - grey, purple, shades of blue 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 Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.