Icelandite is one of the important type of rocks. If we have to define Icelandite in general, Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock. Icelandite comes under Igneous Rocks. All Igneous Rocks have similar properties and formation process. Along with Icelandite Definition, know more about the History of Icelandite, Etymology of Icelandite in next sections.