Know all about Icelandite and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Icelandite and Trachyandesite belong to Igneous Rocks.Texture of Icelandite is Aphanitic to Porphyritic whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Icelandite appears Dull and Soft and Trachyandesite appears Dull and Soft. The luster of Icelandite is vitreous while that of Trachyandesite is earthy. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Icelandite are cemetery markers, creating artwork and that of Trachyandesite are creating artwork, pottery.