mineral

Amazonite

K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)

Hardness: 6-6.5 on Mohs scale; Color: Turquoise-green to blue-green, often with white streaks; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions roughly 90 degrees apart; Specific gravity: 2.56-2.58

Hardness: 6-6
Color: Turquoise-green to blue-green, often with white streaks
Luster: Vitreous to pearly

Identified March 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed in granitic pegmatites and metamorphic rocks. The distinct blue-green color is caused by the presence of small amounts of lead and water within the feldspar structure during crystallization in late-stage igneous environments.

Uses & applications

Used primarily 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 striking color and association with smoky quartz.

Geological facts

Formerly known as 'Amazon Stone', it was named after the Amazon River, though it is not actually found there. It is the official state mineral of Colorado, USA, where world-class specimens associated with smoky quartz are found at Pikes Peak.

Field identification & locations

Identify in the field by its distinct 'plaid' or perthitic texture (white streaks), blocky cleavage, and characteristic turquoise color. Common locations include the USA (Colorado, Virginia), Russia (Ural Mountains), Madagascar, and Brazil.

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