Know all about Flint and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Flint and Coal belong to Sedimentary Rocks.Texture of Flint is Banded, Rough whereas that of Coal is Amorphous, Glassy. Flint appears Glassy or Pearly and Coal appears Veined or Pebbled. The luster of Flint is vitreous while that of Coal is dull to vitreous to submetallic. Flint is available in black, brown, green, grey, red, white colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.