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