Properties of Icelandite and Hornblendite play an important role in determining the type of rock. Along with Icelandite vs Hornblendite properties, get to know more about Icelandite Definition and Hornblendite 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 Hornblendite.