Unknown, it has been known since before recorded history.
There's no such thing as a "first magnet". Natural magnets have been around since essentially the big bang.
Currently, to my knowledge, nobody has discovered a monopole (magnet with a single pole), although this is something that is predicted by super string theory and the grand unification theory. So for now, in your everyday life, it is safe to say that a magnet always has two poles.
Magnetic separation was discovered by William Fullarton in the 1790s. He observed that a magnet could be used to separate magnetic materials from non-magnetic materials, leading to the development of the magnetic separation technique.
A magnet. It is described as a Magnet.
They are bar magnet ,horse shoe magnet ,lime stone magnet.
Magnesia
china
magnet where not made they were discovered,900 years ago lodstone was discovered it contain special properties to attract other material such as magnetic material
Micheal Faraday
by using their on identifyng magnet GLASSes of thermodaynamics
Michael Faraday
Magnesia
Artificial magnets were first discovered in ancient Greece in the city of Magnesia, leading to the term "magnet" to describe them. Magnetite, a natural magnetic material, was found in the region and is believed to be the source of the first artificial magnets.
I believe it was in Europe, during the 14-16 century,in a small market town.
Faraday, proposed lines of flux and lines of force.
J J Thomson
The first magnets were discovered in ancient Greece around 600 BC. The discovery is attributed to a shepherd named Magnes who noticed that the iron nails in his shoes were sticking to a rock called magnetite.