gemstone

Tumbled amber

Amber (fossilized plant resin; commonly succinite, C10H16O)

AI-generated identification · may be incorrect

Hardness 2–2.5 Mohs; translucent honey-brown to dark reddish-brown with resinous luster, conchoidal fracture, and no cleavage. Very low density (~1.05–1.10), often buoyant in salt water; apparent blue surface streaks are likely reflections.

Identified August 11, 2026More gemstone →

Explore Tumbled amber in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Amber formed when ancient tree resin was buried, polymerized, and chemically altered over millions of years, commonly during the Cretaceous–Neogene (about 145–2.6 million years ago). Major deposits occur in Baltic-region sediments, the Dominican Republic, Myanmar, Mexico, and Indonesia.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and historical jewelry; small polished pieces are inexpensive, while insect inclusions and exceptional color increase value.

Geological facts

Amber is organic rather than a mineral because it lacks a crystalline structure; rubbing can produce static electricity, and gentle heating releases a pine-like odor.

Field identification & locations

Identify by light weight, warm touch, resinous appearance, static after rubbing, and possible fluorescence; beware copal, modern resin, and pressed amber imitations. This specimen appears polished and inclusion-free.