gemstone

Amber (rough fossilized resin)

Amber; predominantly polymerized fossil plant resin, commonly succinite (C₁₀H₁₆O)

AI-generated identification · may be incorrect

Typically translucent yellow-brown to reddish brown with resinous luster; Mohs hardness 2–2.5, amorphous rather than crystalline, very low density (~1.05–1.10), and no cleavage. The specimen appears rough, irregular, and resinous, though its dark color and glossy areas make exact identification uncertain.

Identified September 1, 2026More gemstone →

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Physical properties

Formation & geological history

Amber formed when ancient tree resin was buried, chemically altered, and hardened over tens of millions of years; Baltic amber is commonly Eocene (~44– Baltica) in age, while other deposits vary widely. It occurs in sedimentary sands, lignite, and coastal placer deposits.

Uses & applications

Cut and polished amber is used in jewelry, ornaments, beads, and collectibles; powdered amber has limited industrial and historical uses. Raw fragments are often sold as specimens.

Geological facts

Amber can float in concentrated salt water and becomes electrostatically charged when rubbed; heating may produce a pine-like odor. Inclusions of insects or plant matter greatly increase interest and value.

Field identification & locations

Test cautiously: amber is warm to the touch, lightweight, scratches easily, and may fluoresce blue-white under UV; copal, plastic, and colored glass are common look-alikes. Common sources include the Baltic region, Dominican Republic, Mexico, Myanmar, and Indonesia.