Rock Identifier
Amber (Fossilized tree resin (C10H16O)) — gemstone
gemstone

Amber

Fossilized tree resin (C10H16O)

Hardness of 2-2.5 on the Mohs scale, golden-yellow to orange-brown color (sometimes red or green), resinous to vitreous luster, amorphous crystal structure, specific gravity of 1.05-1.10.

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Physical properties

Hardness of 2-2.5 on the Mohs scale, golden-yellow to orange-brown color (sometimes red or green), resinous to vitreous luster, amorphous crystal structure, specific gravity of 1.05-1.10.

Formation & geological history

Formed from the fossilization of plant resin, primarily from conifers, over millions of years (ranging from carboniferous to quaternary periods, mostly Eocene).

Uses & applications

Used in jewelry, decorative items, and historically in folk medicine. Highly valued by paleontologists for preserved inclusions of ancient insects and plant matter.

Geological facts

Amber can float in saltwater and becomes electrostatically charged when rubbed. Some pieces contain remarkably preserved prehistoric insects, feathers, and flora.

Field identification & locations

Found in regions with ancient forest deposits, notably the Baltic region, the Dominican Republic, and Myanmar. Identified by its warm touch, low specific gravity, and resinous smell when rubbed.