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