Know all about Hornfels and Troctolite properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Troctolite belongs to Igneous Rocks.Texture of Hornfels is Granular, Platy whereas that of Troctolite is Phaneritic. Hornfels appears Dull and Troctolite appears Veined and Shiny. The luster of Hornfels is shiny while that of Troctolite is not available. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Troctolite is available in dark grey to black colors. The commercial uses of Hornfels are cemetery markers, commemorative tablets, creating artwork and that of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.