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