Know all about Icelandite and Mylonite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite belongs to Igneous Rocks while Mylonite belongs to Metamorphic Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Mylonite is Foliated. Icelandite appears Dull and Soft and Mylonite appears Dull, Banded and Foilated. The luster of Icelandite is vitreous while that of Mylonite is shiny. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Mylonite is available in black to grey colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Mylonite are creating artwork, gemstone, jewelry.