mineral

Amazonite

Potassium Feldspar (KAlSi3O8) with lead impurities

AI-generated identification · may be incorrect

Hardness: 6-6.5; Color: turquoise-green to bluish-green, often with white streaks; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect at two directions, nearly 90 degrees; Specific Gravity: 2.56-2.58

Hardness: 6-6
Color: turquoise-green to bluish-green, often with white streaks
Luster: Vitreous to pearly

Identified February 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous environments, specifically granitic pegmatites and hydrothermal veins. The blue-green color is caused by trace amounts of lead and water within the feldspar lattice.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons, beads) and ornamental carvings. It is also a popular specimen for mineral collectors.

Geological facts

Historically called 'Amazon stone,' it was named after the Amazon River, though it is not actually found there. The color was once thought to be caused by copper, but modern analysis confirmed lead impurities are responsible.

Field identification & locations

Identify by its distinct greenish-blue hue and the characteristic 'schiller' or grid-like white pattern. Commonly found in Russia (Ilmen Mountains), USA (Colorado, Virginia), Brazil, and Madagascar.