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