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