mineral

Amazonite

Microcline feldspar, KAlSi₃O₈

AI-generated identification · may be incorrect

Blue-green to green, typically opaque with vitreous to pearly luster; Mohs hardness 6–6.5, monoclinic crystal structure, and two cleavages near 90°. The specimens show pale turquoise-green color and white mottling, possibly from albite intergrowths or weathering.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Amazonite forms mainly in potassium-rich granitic pegmatites as slowly cooled igneous material, commonly millions to billions of years old. It occurs with quartz, albite, smoky quartz, and mica.

Uses & applications

Used as a decorative stone, ornamental carvings, beads, cabochons, and mineral specimens; it is not generally used as a major construction material.

Geological facts

Its color is associated with trace lead and water-related defects in the feldspar structure, not with copper as sometimes claimed. The name refers to the Amazon River, although classic material comes from elsewhere.

Field identification & locations

Common localities include Colorado and Virginia, USA; Brazil; Russia; Madagascar; and Namibia. Identify it by its blue-green color, blocky feldspar cleavage, moderate hardness, and inability to scratch quartz.