mineral

Amazonite

Potassium Feldspar (Microcline) - KAlSi3O8

Hardness: 6.0-6.5 on Mohs scale. Color: Greenish-blue to turquoise. Luster: Vitreous to pearly. Crystal structure: Triclinic. Cleavage: Perfect in two directions. Specific gravity: 2.56-2.58.

Hardness: 6
Color: Greenish-blue to turquoise
Luster: Vitreous to pearly

Identified March 22, 2026More mineral →

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Physical properties

Hardness: 6.0-6.5 on Mohs scale. Color: Greenish-blue to turquoise. Luster: Vitreous to pearly. Crystal structure: Triclinic. Cleavage: Perfect in two directions. Specific gravity: 2.56-2.58.

Formation & geological history

Formed in plutonic rocks, primarily granitic pegmatites. The distinct color is caused by trace amounts of lead and water within the feldspar structure during crystallization millions of years ago, typically in the Proterozoic or Paleozoic eras.

Uses & applications

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

Geological facts

Amazonite is known as the 'Stone of Hope' or 'Amazon Stone,' and while named after the Amazon River, it is not actually found there; it was likely confused with green nephrite jade found in that region in antiquity.

Field identification & locations

Identify by its unique 'schiller' effect (a silvery sheen or cross-hatch structure) and the vivid blue-green color. Common locations include the Pikes Peak area in Colorado, Brazil, Madagascar, and Russia. Collectors should look for crystalline faces and intense saturation.

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