Properties of Icelandite and Comendite play an important role in determining the type of rock. Along with Icelandite vs Comendite properties, get to know more about Icelandite Definition and Comendite Definition. For the ease of understanding, the properties of rocks are divided into physical and thermal properties. Rocks have a variety of properties like hardness, color, specific gravity, fracture, cleavage, luster etc. Know all about physical and thermal properties of Icelandite and Comendite.