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