Know all about Hornfels and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Icelandite belongs to Igneous Rocks.Texture of Hornfels is Granular, Platy whereas that of Icelandite is Aphanitic to Porphyritic. Hornfels appears Dull and Icelandite appears Dull and Soft. The luster of Hornfels is shiny while that of Icelandite is vitreous. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Hornfels and Icelandite are cemetery markers, commemorative tablets, creating artwork.