mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Hardness: 6–6.5 Mohs scale; Color: Turquoise, blue-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56–2.58

Hardness: 6–6
Color: Turquoise, blue-green
Luster: Vitreous to pearly

Identified March 18, 2026More mineral →

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Physical properties

Hardness: 6–6.5 Mohs scale; Color: Turquoise, blue-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific gravity: 2.56–2.58

Formation & geological history

Formed in igneous environments, specifically in granite pegmatites and metamorphic rocks. Its distinct color is attributed to the presence of lead and water within the feldspar lattice. Most deposits date from the Precambrian to Cenozoic eras.

Uses & applications

Primarily used as a gemstone for jewelry, cabochons, and ornamental carvings. It is also a popular specimen for mineral collectors and is sometimes used in metaphysical practices.

Geological facts

Also known as 'Amazon Stone,' it was named after the Amazon River, though no deposits actually exist there. The blue-green color was long thought to be from copper, but modern research indicates it is caused by trace amounts of lead and water.

Field identification & locations

Identify in the field by its distinct 'shiller' or aventurescence (a white streaky play of light) and its turquoise-green color. It is commonly found in Russia (Ilmen Mountains), Brazil, Madagascar, and the USA (Colorado and Virginia).