Know all about Trondhjemite and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Trondhjemite belongs to Igneous Rocks while Hornfels belongs to Metamorphic Rocks.Texture of Trondhjemite is Phaneritic whereas that of Hornfels is Granular, Platy. Trondhjemite appears Banded and Foilated and Hornfels appears Dull. The luster of Trondhjemite is subvitreous to dull while that of Hornfels is shiny. Trondhjemite is available in black, brown, light to dark grey, white colors whereas Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. The commercial uses of Trondhjemite are cemetery markers, creating artwork and that of Hornfels are cemetery markers, commemorative tablets, creating artwork.