Baroque Golden Baltic Amber Choker. Amber is a gem, but it is a resin of ancient Jurassic period trees that petrified over a period of tens of millions of years. The age of Amber is between 35 and 140 million years. Amber can be found in many countries, but the Baltic Sea region contains 95 percent of the world's amber. Baltic amber is considered to be the best in the world for its beauty and quality.