Amber is a fossilized resin from pines and other conifers that are several thousands to millions years old. It is also called electron and is found mainly in the Baltic region. Although it is not a stone, but a hardened resin, it is used as a gemstone for the manufacture of jewelry and other decorative objects.
Pressed amber is the material created by compressing amber powder and fragments collected during the processing of pure amber. It is cheaper, heavier and slightly more durable.