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