How old is the word magnet?

Answer 1

It started as being known as 'the Magnesian Stone' from Magnesia, a region in Thessaly where the ore was obtained The word spread from Latin to most European countries as magnet, magneet or magnete. The origins are sometime before the 1400's when both the Latin and Greek word was 'magneta'

Answer 2

The word "magnet" dates back to the 15th century, derived from the French word "magnete" and Latin word "magnetum," both of which trace back to the Greek word "magnēs."