Amber is found in the Baltic Sea area, the Netherlands, Denmark, Ukraine, Mexico and the Dominican Republic. It is a fossil resin and is widely imitated with plastic or artificial resin. You can test to see if it is real natural amber by rubbing paper shreds over the amber with a cloth. With real amber, the paper shreds are attracted to the amber because amber is static. This does not happen with plastic or synthetic resin.
Amber often has inclusions of insects or twigs. So amber is not stone. Is, among other things, from the movie Jurassic Park, known for the insects occasionally found in amber.