mineral

Amazonite (Green Feldspar)

Microcline (variety Amazonite), Chemical Formula: K(AlSi3O8)

Hardness: 6.0 - 6.5 on the Mohs scale; Color: Greenish-blue, turquoise, or light green with white streaks; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.55-2.57.

Hardness: 6
Color: Greenish-blue, turquoise, or light green with white streaks
Luster: Vitreous to pearly

Identified March 11, 2026More mineral →

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Physical properties

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. It is found in deposits dating from the Proterozoic to the Mesozoic eras.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons and beads) and as an ornamental stone for carvings. It is also a popular specimen for mineral collectors due to its unique color.

Geological facts

Also known as 'Amazon Stone,' it was named after the Amazon River, although no deposits have actually been found there. It has been used in jewelry since the time of the Pharaohs in Ancient Egypt; the famous death mask of Tutankhamun features amazonite inlays.

Field identification & locations

Identify in the field by its distinct 'schiller' or cross-hatch pattern (perthitic texture) and vivid turquoise color. Commonly found in the Ilmensky Mountains (Russia), Colorado and Virginia (USA), Madagascar, and Brazil. Collectors should look for depth of color and lack of internal fractures.

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