mineral

Amazonite

Lead-bearing Microcline (KAlSi3O8)

Hardness: 6-6.5 on Mohs scale; Color: Turquoise, blue-green, sea-foam green; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.55-2.57

Hardness: 6-6
Color: Turquoise, blue-green, sea-foam green
Luster: Vitreous to pearly

Identified June 19, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale; Color: Turquoise, blue-green, sea-foam green; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.55-2.57

Formation & geological history

Formed in granitic pegmatites, hydrothermal veins, and schists. The distinct blue-green color is caused by trace amounts of lead and water within the feldspar lattice. Most specimens are found in Precambrian formations.

Uses & applications

Primarily used as a gemstone for jewelry (cabochons, beads) and as an ornamental stone for carvings. It is also a highly sought-after mineral specimen for collectors due to its vibrant color.

Geological facts

Named after the Amazon River, though it is not actually found there. It is the green variety of microcline feldspar. Its color is distinctive enough that it was once thought to be caused by copper.

Field identification & locations

Identified by its vivid green-to-blue color and distinctive 'perthitic' (white, streaky) texture. Commonly found in Russia, Brazil, Ethiopia, and the Pikes Peak area of Colorado, USA. Collectors look for sharp, well-defined crystals over massive chunks.