What is amber
Last updated: April 1, 2026
Key Facts
- Amber is fossilized plant resin that can be over 300 million years old
- It often contains preserved insects, leaves, and other ancient organic material trapped during fossilization
- Amber ranges in color from pale yellow to deep brown, red, and occasionally blue or green hues
- The Baltic region, particularly Lithuania and Poland, contains the world's largest amber deposits
- Amber has been used for jewelry, decorative objects, traditional medicine, and historically as a trade commodity
Formation and Origin
Amber forms when sticky tree resin from ancient conifers and other trees is buried under sediment and exposed to heat and pressure over millions of years. This process hardens the resin into a solid, semi-precious gemstone. The oldest amber deposits date back over 300 million years to the Carboniferous period, though most commercial amber is 50-90 million years old.
Physical Properties
Amber is lightweight, brittle, and warm to the touch. It ranges in hardness and can be polished to a high shine. The most prized amber is transparent, allowing light to pass through, while opaque or cloudy amber, called "bone amber," is also valued. Amber is thermoplastic, meaning it softens slightly when heated, which ancient craftspeople used to shape it.
Inclusions and Fossils
One of amber's most fascinating features is its ability to preserve ancient life. Insects, spiders, seeds, and even small lizards became trapped in the sticky resin millions of years ago. These inclusions provide paleontologists with exceptional windows into ancient ecosystems and have been used to extract ancient DNA for scientific research.
Mining and Deposits
The Baltic region produces approximately 70% of the world's amber supply. Other significant deposits exist in the Dominican Republic, Mexico, Myanmar (Burma), and the Baltic countries of Lithuania, Latvia, and Estonia. Amber is harvested through open-pit mining and coastal collection, where waves deposit amber on beaches.
Uses and Value
Amber has been treasured for thousands of years. Ancient Egyptians, Greeks, and Romans valued it for jewelry and decorative objects. Today, it remains popular in rings, necklaces, and brooches. Amber is also used in traditional medicine in some cultures, though scientific evidence of health benefits is limited. Synthetic amber and plastic imitations are common, making authentication important for collectors.
Related Questions
How is amber formed?
Amber forms when tree resin is buried underground and exposed to heat and pressure over millions of years, gradually hardening into a solid gemstone through a process of fossilization and polymerization.
What is inside amber?
Amber often contains preserved insects, plant material, air bubbles, and occasionally larger organisms like small lizards or frogs that became trapped in the sticky resin millions of years ago.
Is amber a gemstone?
Yes, amber is classified as an organic gemstone and semi-precious stone. It is valued for jewelry and collectible items, though it is softer and more fragile than traditional minerals like diamonds or rubies.
Sources
- Wikipedia - Amber CC-BY-SA-4.0
- USGS - Amber Information Public Domain