mineral

Amazonite

K(AlSi3O8) - Microcline (Var. Amazonite)

Hardness: 6-6.5 (Mohs scale); Color: Pale green to turquoise blue; Luster: Vitreous; Crystal Structure: Triclinic; Cleavage: Perfect in two directions at nearly 90 degrees; Specific Gravity: 2.56-2.58

Hardness: 6-6
Color: Pale green to turquoise blue
Luster: Vitreous

Identified April 13, 2026More mineral →

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Physical properties

Formation & geological history

Formed in igneous environments, specifically granitic pegmatites and hydrothermal veins. Its distinct color is attributed to the presence of small amounts of lead and water within the feldspar structure.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons and beads) and as an ornamental stone for carvings and decorative objects.

Geological facts

Also known as 'Amazonstone,' it was named after the Amazon River, though it is not actually found there. The color variation can range from subtle mint to a deep turquoise, often featuring white streaking or 'schiller' effect.

Field identification & locations

Identify by its distinctive blue-green color and blocky cleavage typical of feldspars. Commonly found in Russia (Ilmen Mountains), USA (Colorado and Virginia), Madagascar, and Brazil.