Know all about Tonalite and Coal properties here. All properties of rocks are important as they define the type of rock and its application. Tonalite belongs to Igneous Rocks while Coal belongs to Sedimentary Rocks.Texture of Tonalite is Phaneritic whereas that of Coal is Amorphous, Glassy. Tonalite appears Banded and Foilated and Coal appears Veined or Pebbled. The luster of Tonalite is subvitreous to dull while that of Coal is dull to vitreous to submetallic. Tonalite is available in black, brown, light to dark grey, white colors whereas Coal is available in black, brown, dark brown, grey, light to dark grey colors. The commercial uses of Tonalite 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.