mineral

Amazonite

Potassium Feldspar (KAlSi3O8)

Hardness: 6-6.5 on the Mohs scale. Color: Bright blue-green to teal. Luster: Vitreous to pearly on cleavage planes. Crystal Structure: Triclinic. Cleavage: Perfect at nearly 90-degree angles. Specific Gravity: 2.56-2.58.

Hardness: 6-6
Color: Bright blue-green to teal
Luster: Vitreous to pearly on cleavage planes

Identified July 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic igneous rocks, primarily granitic pegmatites and hydrothermal veins, where potassium-rich fluids slow-cool over extensive geological periods. Its distinctive turquoise-blue color is caused by trace amounts of lead and water within the feldspar structure.

Uses & applications

Popular as a semi-precious gemstone used in jewelry (beads, cabochons, pendants) and highly sought after by mineral collectors. Also used in ornamental carvings and metaphysical crystals.

Geological facts

Named after the Amazon River, though no actual deposits are found there; it was likely confused with another green stone by early explorers. Outstanding specimens often occur alongside smoky quartz crystals, particularly from Colorado's Pikes Peak region.

Field identification & locations

Identified by its distinctive bluish-green color, blocky cleavage, and characteristic white perthitic striations across crystal surfaces. Major localities include Brazil, Russia (Ural Mountains), Madagascar, Mozambique, and the USA (Colorado and Virginia).