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