Amber, a fossil resin. It was formed millions of years ago from a sticky fluid that oozed from the bark of evergreen trees, such as pine. Amber often contains the preserved bodies of insects that were caught and embedded in it. Amber is a soft, brittle material, and is usually yellow, orange, or brown. Most amber is transparent or translucent and takes a fine polish. Attractive pieces of amber are used for jewelry, ornaments, and pipestems. Low-quality amber is used to make varnish. The world's major deposits of high-quality amber lie along the southern shores of the Baltic Sea.

When rubbed, amber acquires an electric charge and will attract bits of paper. The ancient Greeks called amber elektron, and from this term comes the word electricity.