gemstone

Amber

Fossilized tree resin; chiefly organic terpenoid resin (not a mineral)

AI-generated identification · may be incorrect

Mohs hardness 2–2.5; translucent orange-brown with resinous luster, conchoidal fracture, and very low density (~1.05–1.10). It commonly shows flow lines, inclusions, and warm yellow fluorescence under UV.

Identified August 26, 2026More gemstone →

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Physical properties

Formation & geological history

Formed when ancient conifer or flowering-plant resin polymerized and fossilized during burial, commonly from the Cretaceous to Miocene (about 145–5 million years ago). Major deposits occur in Baltic-region sediments, the Dominican Republic, Mexico, Myanmar, and Indonesia.

Uses & applications

Used for beads, cabochons, carvings, decorative objects, and historical jewelry; industrial uses are limited. Inclusions such as insects can greatly increase desirability.

Geological facts

Amber is warm to the touch, floats in concentrated salt water, and becomes electrostatically charged when rubbed. Dominican amber is often prized for abundant insect and plant inclusions.

Field identification & locations

Identify it by its light weight, resinous appearance, alcohol/acetone sensitivity, static charge, and characteristic pine-like odor when gently warmed; avoid destructive tests. The pictured orange translucent material is consistent with polished amber.