What is another name for fossilized resin?

Another name for fossilized resin is amber.

Amber forms when tree resin survives burial and gradually hardens through heat, pressure, and chemical change. The resin first loses volatile compounds and may pass through a subfossil stage called copal before becoming more fully polymerized and stable. Because resin can trap small organisms and plant fragments while it is sticky, amber sometimes preserves insects, flowers, feathers, and other biological material in remarkable detail.

Amber has been valued since prehistoric times for its warm colors, light weight, and ability to be polished into ornaments. Baltic amber is especially famous and has been traded across Europe for thousands of years. Its usual colors range from pale yellow to orange and brown, although red, green, blue, and nearly black varieties also occur.

Amber is sometimes confused with ambergris, a waxy substance associated with sperm whales. Despite the similar name, ambergris is animal-derived, while amber is fossilized plant resin. Copal is another common mix-up: it is younger, incompletely fossilized resin rather than mature amber.