Know all about Rhyolite and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Rhyolite and Icelandite belong to Igneous Rocks.Texture of Rhyolite is Aphanitic, Glassy, Porphyritic whereas that of Icelandite is Aphanitic to Porphyritic. Rhyolite appears Banded and Icelandite appears Dull and Soft. The luster of Rhyolite is earthy while that of Icelandite is vitreous. Rhyolite is available in grey, white, light black colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Rhyolite are gemstone, laboratory bench tops, jewelry and that of Icelandite are cemetery markers, creating artwork.