The first and simplest test is usually the magnet test. The test object is positioned at a 45° angle and a magnet is placed on top of it. No precious metal is magnetic, and the magnet must not be retained attached to sample. Rare metals are diamagnetic, which means that the magnet should slowly slide down the tested metal, but there is no strong magnetic field between them. This method is simple and inexpensive, but only reveals very cheap and low-quality counterfeits.