Amber is the fossilized resin from ancient forests. In ancient times the resin dripped and oozed down trees, filling fissures and trapping debris such as seeds, leaves, feathers and insects. The resin then became buried and fossilized through a natural polymerisation creating amber. The two main sources of amber in today's market are the Baltic states and the Dominican Republic. Amber from the Baltic states is older than that from the Dominican Republic is more likely to have insect inclusions. Most of the world's amber is in the range of 30-90 million years old. Semi-fossilized resin or sub-fossil amber is called copal.