Know all about Hornfels and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Variolite belongs to Igneous Rocks.Texture of Hornfels is Granular, Platy whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Hornfels appears Dull and Variolite appears Dull and Soft. The luster of Hornfels is shiny while that of Variolite is not available. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Variolite is available in black, brown, light to dark grey colors. The commercial uses of Hornfels and Variolite are cemetery markers, commemorative tablets, creating artwork.