mineral

Amazonite

Microcline (KAlSi3O8) with Pb trace impurities

Hardness: 6-6.5 on Mohs scale; Color: Bright turquoise-green to bluish-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Two perfect directions at nearly 90 degrees; Specific gravity: 2.56-2.58.

Hardness: 6-6
Color: Bright turquoise-green to bluish-green
Luster: Vitreous to pearly

Identified July 1, 2026More mineral →

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Physical properties

Formation & geological history

Amazonite is a variety of potassium feldspar (Microcline) that forms in plutonic igneous rocks, primarily pegmatites. Its distinct color is caused by the presence of lead and water within the mineral structure. It is often found in associations with smoky quartz and mica.

Uses & applications

Primarily used as a gemstone for jewelry, beads, and cabochons. It is also a very popular specimen for mineral collectors and is sometimes used in decorative carvings.

Geological facts

Named after the Amazon River, where green stones were reportedly found, though it is not actually found in the Amazon basin. The color was long thought to be due to copper, but recent research confirms it is caused by lead impurities.

Field identification & locations

Identified in the field by its distinct blue-green color and tell-tale white streaks (perthitic texture) of albite. Major sources include the Pikes Peak area of Colorado (USA), Brazil, Russia, and Madagascar.

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