Amazonite

Physical Properties

Hardness: 6-6.5 Mohs; Color: Turquoise-green to blue-green with white streaking; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.

Formation & Geological History

Formed in granitic pegmatites and metamorphic rocks through slow cooling of potassium-rich magma, often associated with smoky quartz and feldspar.

Uses & Applications

Primarily used as a gemstone for jewelry (cabochons and beads) and as a popular ornamental stone for carvings and decorative spheres.

Geological Facts

Named after the Amazon River, though it is not actually found there; the green color was long a mystery but is now attributed to trace amounts of lead and water within the feldspar structure.

Field Identification & Locations

Identify by its distinct blue-green color and light-colored characteristic 'grid-like' or 'streaked' schiller effect. Found commonly in Brazil, Russia (Urals), Madagascar, and Colorado (USA).

Identified on: 4/29/2026

Mode: Standard