mineral

Amazonite

K(AlSi3O8) - Potassium Aluminum Silicate (Lead-bearing Microcline)

AI-generated identification · may be incorrect

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

Hardness: 6-6
Color: blue-green to turquoise
Luster: vitreous to pearly

Identified July 13, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in granitic pegmatites and hydrothermal veins. Its distinct color is caused by trace amounts of lead and water within the feldspar lattice. Most specimens date from the Precambrian to Cenozoic eras.

Uses & applications

Primarily used as a gemstone for jewelry, beads, and cabochons. It is also a very popular mineral specimen for collectors due to its striking color.

Geological facts

Also known as Amazon Stone, it was originally named after the Amazon River, though it is not actually found there. It is the official state mineral of Colorado.

Field identification & locations

Identify by its distinctive blue-green color with white striations (exsolution lamellae) and characteristic feldspar cleavage planes. Found notably in Brazil, Russia, Madagascar, and the USA (Colorado and Virginia).