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