Know all about Tonalite and Flint properties here. All properties of rocks are important as they define the type of rock and its application. Tonalite belongs to Igneous Rocks while Flint belongs to Sedimentary Rocks.Texture of Tonalite is Phaneritic whereas that of Flint is Banded, Rough. Tonalite appears Banded and Foilated and Flint appears Glassy or Pearly. The luster of Tonalite is subvitreous to dull while that of Flint is vitreous. Tonalite is available in black, brown, light to dark grey, white colors whereas Flint is available in black, brown, green, grey, red, white colors. The commercial uses of Tonalite are cemetery markers, creating artwork and that of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.