mineral

Amazonite (or Amazon Stone)

Potassium Feldspar (Microcline), K(AlSi3O8)

Hardness: 6–6.5 (Mohs scale); Color: Pale green to deep turquoise blue-green with white streaks; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56–2.58.

Hardness: 6–6
Color: Pale green to deep turquoise blue-green with white streaks
Luster: Vitreous to pearly

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic rocks, specifically granitic pegmatites. The blue-green color results from trace amounts of lead and water within the feldspar structure. It is often associated with quartz and orthoclase.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors.

Geological facts

For many years, the source of its color was a mystery, with some believing it was due to copper. It is named after the Amazon River, though no deposits have actually been found there; the name likely comes from confusion with other green stones found in that region.

Field identification & locations

Identify in the field by its distinct 'schiller' or pearly sheen and the presence of fine white grid-like streaks (perthitic texture). Common locations include Pike's Peak (Colorado, USA), Brazil, Russia (Ilmen Mountains), and Madagascar.

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