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