Pathological Microscope is commonly used to observe a series of characteristics in a mineral that reflects its properties and allow us to identify it. It is a compound microscope which can work with plane-polarized light that has some peculiarities.Pathological Microscope is a part of the microscope that is located above the base and below the stage that is called the substage assembly. It is the substage assembly that includes the condenser, the lower polarizer, light filters, and diaphragms.