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