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