Magnet
A 'magnet' is a very special metal. Also, if the two poles are the same, the two magnets will push away, or 'repel', from each other. This is called 'magnetism'. Magnets can make some other metals into magnets when they are rubbed together. Permanent magnets occur naturally in some rocks, particularly lodestone, but are now more commonly manufactured. A magnet's magnetism decreases when it is heated and increases when it is cooled. It has to be heated at around 1000 degrees Celsius.