Know all about Tonalite and Banded iron formation properties here. All properties of rocks are important as they define the type of rock and its application. Tonalite belongs to Igneous Rocks while Banded iron formation belongs to Sedimentary Rocks.Texture of Tonalite is Phaneritic whereas that of Banded iron formation is Banded, Trellis. Tonalite appears Banded and Foilated and Banded iron formation appears Layered, Banded, Veined and Shiny. The luster of Tonalite is subvitreous to dull while that of Banded iron formation is earthy. Tonalite is available in black, brown, light to dark grey, white colors whereas Banded iron formation is available in red, reddish brown colors. The commercial uses of Tonalite are cemetery markers, creating artwork and that of Banded iron formation are as a touchstone, cemetery markers, creating artwork.