Amber

It is a fossilized resin from ancient trees, often prized for its natural beauty and historical significance.

An excerpt from the article 18 facts about amber

The oldest amber is approximately 320 million years old, making it a valuable window into prehistoric ecosystems and climatic conditions. This ancient resin often encapsulates small organisms, such as insects, and provides an invaluable insight into the biological diversity of past eras. In addition, amber has been used in jewelry and decorative items for millennia, demonstrating its enduring appeal across cultures and time.