Know all about Icelandite and Phonolite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite and Phonolite belong to Igneous Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Phonolite is Granular. Icelandite appears Dull and Soft and Phonolite appears Banded and Foilated. The luster of Icelandite is vitreous while that of Phonolite is greasy to dull. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Phonolite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Icelandite and Phonolite are cemetery markers, creating artwork.