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