mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Hardness: 6.0-6.5 (Mohs); Color: Green to blue-green (often with white or cream streaks); Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions intersecting at nearly 90 degrees; Specific gravity: 2.56-2.58.

Hardness: 6
Color: Green to blue-green (often with white or cream streaks)
Luster: Vitreous to pearly

Identified March 29, 2026More mineral →

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Physical properties

Formation & geological history

Forms in plutonic igneous rocks, primarily pegmatites, where slow cooling allows crystal development. Its distinctive 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 as an ornamental stone for carvings and decorative objects. It is also an important mineral for geological collectors.

Geological facts

Historically named after the Amazon River, though it is not actually found there. The Ancient Egyptians used amazonite widely for jewelry and ornaments, including parts of Tutankhamun's gold mask.

Field identification & locations

Identify by its 'shimmer' (schiller effect) and the presence of white grid-like or perthitic textures within the teal background. Commonly found in Brazil, Russia (Ural Mountains), and the United States (Colorado and Virginia). Collectors should look for vibrant blue-green hues and well-defined crystal shapes.