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