Know all about Hornfels and Appinite properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Appinite belongs to Igneous Rocks.Texture of Hornfels is Granular, Platy whereas that of Appinite is Porphyritic. Hornfels appears Dull and Appinite appears Dull, Banded and Foilated. The luster of Hornfels is shiny while that of Appinite is subvitreous to dull. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Appinite is available in black, bluish - grey, brown, dark greenish - grey, green, grey colors. The commercial uses of Hornfels are cemetery markers, commemorative tablets, creating artwork and that of Appinite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner.