Baltic amber accounts for nearly 80% of amber around the world. Amber is not actually a stone, but rather, tree resin—much like sap—which escaped from trees in what is now the Baltic Sea millions of years ago. The resin leaked from holes in the tree trunks and eventually hardened with the flora and fauna which became trapped inside. Baltic amber is the lightest in color of all amber. It is often a yellowish gold color and translucent.