mineral

Amazonite

Microcline (KAlSi3O8)

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

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

Identified July 6, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in plutonic igneous rocks, specifically granitic pegmatites. The green color is caused by trace amounts of lead and water within the feldspar structure.

Uses & applications

Primarily used as a gemstone for jewelry, cabochons, beads, and metaphysical specimens. It was historically used in ancient Egypt for talismans and beads.

Geological facts

Also known as the 'Amazon Stone,' it was named after the Amazon River, though there are no known deposits of green feldspar in that region. It is most famous from the Pikes Peak area in Colorado.

Field identification & locations

Identify by its distinctive blue-green color and 'chiller' pattern (white streaks caused by albite exsolution). Found commonly in Brazil, Russia, Madagascar, and the USA (Colorado and Virginia).