Rock Identifier
Polished amber-like organic gemstone (Likely amber (fossilized plant resin), possibly copal or brown chalcedony; exact identification requires testing) — gemstone
gemstone

Polished amber-like organic gemstone

Likely amber (fossilized plant resin), possibly copal or brown chalcedony; exact identification requires testing

AI-generated identification · may be incorrect

Translucent honey-brown with dark inclusions and resinous/waxy luster; amorphous, no cleavage, Mohs hardness about 2–2.5 for amber (copal is softer), specific gravity about 1.05–1.10. The smoothly tumbled form and internal cloudy inclusions are consistent with amber, though the image alone cannot exclude chalcedony or…

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Physical properties

Translucent honey-brown with dark inclusions and resinous/waxy luster; amorphous, no cleavage, Mohs hardness about 2–2.5 for amber (copal is softer), specific gravity about 1.05–1.10. The smoothly tumbled form and internal cloudy inclusions are consistent with amber, though the image alone cannot exclude chalcedony or dyed glass.

Formation & geological history

Amber formed from ancient tree resin that polymerized and fossilized during burial, commonly tens to hundreds of millions of years old; copal is geologically younger. Major deposits occur in Baltic-region Paleogene sediments, the Dominican Republic, Myanmar, and elsewhere.

Uses & applications

Used for beads, carvings, cabochons, ornaments, and scientific study of preserved inclusions; industrial use is limited. Chalcedony, if confirmed, is harder and more durable for jewelry.

Geological facts

Amber often floats in concentrated salt water and becomes electrostatically charged when rubbed; heated amber gives a pine-resin odor. A hot-needle test can damage the specimen and should be avoided.

Field identification & locations

Common field clues are very low weight, warm feel, resin odor when safely warmed, and occasional insects or plant fragments; hardness and UV fluorescence help distinguish it from glass and chalcedony.