Know all about Shonkinite and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Shonkinite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks.Texture of Shonkinite is Earthy whereas that of Coal is Amorphous, Glassy. Shonkinite appears Banded and Foilated and Coal appears Veined or Pebbled. The luster of Shonkinite is subvitreous to dull while that of Coal is dull to vitreous to submetallic. Shonkinite is available in brown, buff, cream, green, grey, pink, white colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Shonkinite are cemetery markers, creating artwork and that of Coal are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry.