mineral

Amazonite

Microcline (KAlSi3O8)

Mohs hardness 6 to 6.5, pale blue-green to blue color, vitreous to pearly luster, triclinic crystal system, perfect two-direction cleavage at nearly 90 degrees, specific gravity of 2.56-2.58.

Identified July 27, 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

Mohs hardness 6 to 6.5, pale blue-green to blue color, vitreous to pearly luster, triclinic crystal system, perfect two-direction cleavage at nearly 90 degrees, specific gravity of 2.56-2.58.

Formation & geological history

Formed in plutonic igneous rocks, particularly granites and pegmatites, as well as in some metamorphic rocks. The bluish-green color is caused by trace amounts of lead and water within the feldspar structure.

Uses & applications

Popular gemstone for carvings, cabochons, and beads; widely collected as raw or polished display specimens; also used decoratively.

Geological facts

Named after the Amazon River, though no deposits have actually been found there; the green stone originally called Amazonite by early explorers was likely a different mineral such as jade or aventurine.

Field identification & locations

Identified by its distinctive pale turquoise to mint green color combined with the blocky cleavage typical of potassium feldspars. Commonly found in Brazil, Russia, Madagascar, India, and Colorado, USA.