fossil

Tumbled amber

Fossilized tree resin; predominantly polymerized diterpenoid resin (succinite when Baltic-type)

AI-generated identification · may be incorrect

Honey-yellow, translucent, resinous luster, amorphous/noncrystalline, no cleavage; Mohs hardness about 2–2.5, specific gravity roughly 1.05–1.10. The rounded surface indicates natural or deliberate tumbling/polishing.

Identified August 16, 2026More fossil →

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Physical properties

Formation & geological history

Amber formed when ancient conifer or flowering-plant resin was buried, chemically altered, and hardened over millions of years, commonly from the Cretaceous to Paleogene (about 145–23 million years ago).

Uses & applications

Used for beads, cabochons, carvings, ornaments, and scientific study of inclusions; historically used as incense and decorative material.

Geological facts

Amber is organic fossil resin rather than a mineral or conventional rock. It can float in salt water, becomes electrostatically charged when rubbed, and may emit a pine-like odor when gently warmed.

Field identification & locations

Identify by its very low density, warm feel, softness, resinous appearance, and static charge; common sources include the Baltic region, Dominican Republic, Mexico, Myanmar, and Indonesia. Avoid flame or destructive tests, especially on valuable pieces.