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