amber

Fossilized tree resin — hardened over millions of years into a translucent, honey-colored stone that sometimes contains perfectly preserved insects, spiders, seeds, or air bubbles from a vanished world. Amber is not a mineral; it is organic, the solidified blood of ancient forests. Rub it and it generates static electricity — the Greeks noticed this, and the word electron comes from ēlektron, their name for amber.