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