Amazonite

Physical Properties

Hardness: 6-6.5 Mohs scale; Color: Green to blue-green, turquoise; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions

Formation & Geological History

Formed in plutonic rocks, primarily granites and pegmatites. The blue-green color is attributed to small amounts of lead and water within the feldspar structure during crystallization.

Uses & Applications

Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors.

Geological Facts

Also known as Amazonstone, it was named after the Amazon River, though it is not actually found there. The color was historically thought to be caused by copper, but modern research confirms it is lead-based.

Field Identification & Locations

Identify by its distinct turquoise color and the presence of white streaks or 'schiller' caused by albite exsolution lamellae. Commonly found in Russia, Brazil, and the Pikes Peak area of Colorado, USA.

Identified on: 4/15/2026

Mode: Standard