Amber is fossilized tree resin that has hardened over millions of years through a process known as polymerization. Resin is a sticky substance secreted by plants to protect and heal surface wounds. Due to its texture and the environments where it forms, amber often traps and preserves insects, plant material, and microorganisms, creating remarkable fossils.

Amber doesn't have a single chemical formula because it is a complex mixture of polymerized organic compounds, not a true mineral.

This particular amber specimen was found in the Baltic Sea and is approximately 44 million years old.