mineral

Amazonite

Microcline (KAlSi3O8)

Hardness: 6-6.5; Color: turquoise-green to 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-green to blue-green
Luster: Vitreous to pearly

Identified June 30, 2026More mineral →

Explore Amazonite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-6.5; Color: turquoise-green to blue-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58.

Formation & geological history

Amazonite is a green variety of microcline feldspar. It forms primarily in granitic pegmatites and deep-seated metamorphic rocks through hydrothermal processes, typically where there are trace amounts of lead and water present in the feldspar lattice.

Uses & applications

Used primarily as a gemstone for jewelry, ornamental carvings, and CAB (cabochons). It is also highly sought after by mineral collectors for its vibrant color.

Geological facts

Named after the Amazon River, though it hasn't actually been found there; the green color was long thought to be caused by copper, but modern research suggests it is due to trace amounts of lead and water.

Field identification & locations

Identifiable by its distinct blue-green color and typical feldspar 'schiller' or grid-like white streaks (perthitic texture). Common locations include Colorado (USA), Brazil, Russia, and Madagascar.