mineral

Amber

Fossilized Tree Resin (Generic formula: C10H16O)

Hardness: 2.0-2.5 (Mohs scale); Color: Yellow, orange, brown, and rarely blue/green; Luster: Resinous; Crystal structure: Amorphous; Cleavage: None; Specific gravity: 1.05-1.10 (very light, will float in salt water)

Hardness: 2
Color: Yellow, orange, brown, and rarely blue/green
Luster: Resinous

Identified March 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the polymerization and fossilization of tree resin from extinct coniferous trees, typically dating from the Cretaceous to early Neogene periods (approx. 30-100 million years ago).

Uses & applications

Primarily used in jewelry, decorative arts, and perfumery. It is also significant in scientific paleontology as it frequently contains inclusions of ancient flora and fauna (insects, feathers).

Geological facts

Dominican Blue Amber turns blue under ultraviolet light despite being brownish in indoor lighting. Unlike many other gemstones, amber is warm to the touch and can generate static electricity if rubbed with a cloth.

Field identification & locations

Identify in the field by its light weight and 'plastic' feel; it will float in a saturated salt-water solution (1 part salt to 2 parts water) and emits a pine scent when touched with a hot needle. Commonly found in the Baltic region and the Dominican Republic.

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