mineral

Amazonite

K(AlSi3O8), Microcline (potassium feldspar)

AI-generated identification · may be incorrect

Hardness: 6-6.5; Color: Mint green to blue-green with white streaking; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect at two directions (90 degrees); Specific Gravity: 2.56-2.58

Hardness: 6-6
Color: Mint green to blue-green with white streaking
Luster: Vitreous to pearly

Identified March 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic rocks, primarily granitic pegmatites and hydrothermal veins. Its distinct green color is caused by trace amounts of lead and water within the feldspar lattice. It is found in geological formations ranging from the Precambrian to late Paleozoic eras.

Uses & applications

Primary use is in jewelry as cabochons, beads, and carvings. It is also a popular collector's mineral and is occasionally used in interior decoration (tiles, countertops) when found in large massive forms.

Geological facts

Named after the Amazon River, though it is not actually found there. It was likely confused with other green minerals from the region. The most famous world-class specimens (often associated with smoky quartz) come from the Pikes Peak region of Colorado.

Field identification & locations

Identify by its 'schiller' effect (metallic-like luster beneath the surface) and the characteristic white grid-like streaks known as perthitic texture. Found commonly in Brazil, Russia (Urals), Ethiopia, Madagascar, and the USA (Colorado and Virginia).