mineral

Amazonite

Potassium Aluminum Silicate (KAlSi3O8)

Hardness: 6-6.5 on Mohs scale; Color: Blue-green to turquoise with white streaks (often mottled with yellow-brown iron stains); Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Hardness: 6-6
Luster: Vitreous to pearly

Identified March 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic rocks, primarily granite pegmatites. The distinct blue-green color is caused by trace amounts of lead and water within the feldspar structure. Found in deposits ranging from Proterozoic to more recent geological eras.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads) and as an ornamental stone. It is also a popular specimen for mineral collectors because of its vibrant color and crystal habits.

Geological facts

Amazonite is a variety of Microcline feldspar. Despite its name, it is not actually found in the Amazon River itself, but rather in other parts of Brazil and high-altitude locations like the Pikes Peak area in Colorado.

Field identification & locations

Identify in the field by its distinct 'schiller' or grid-like white patterns (exsolution lamellae) and its unique turquoise-green hue. Common locations include Brazil, Russia, Madagascar, and the USA (Colorado and Virginia). Collectors should look for intense color saturation.