Know all about Trondhjemite and Gneiss properties here. All properties of rocks are important as they define the type of rock and its application. Trondhjemite belongs to Igneous Rocks while Gneiss belongs to Metamorphic Rocks.Texture of Trondhjemite is Phaneritic whereas that of Gneiss is Banded, Foliated, Platy. Trondhjemite appears Banded and Foilated and Gneiss appears Foliated. The luster of Trondhjemite is subvitreous to dull while that of Gneiss is dull. Trondhjemite is available in black, brown, light to dark grey, white colors whereas Gneiss is available in black, brown, pink, red, white colors. The commercial uses of Trondhjemite are cemetery markers, creating artwork and that of Gneiss are cemetery markers, jewelry, tombstones, used in aquariums.