mineral

Amazonite

Amazonite (KAlSi3O8)

Hardness: 6-6.5 (Mohs), Color: Blue-green to turquoise-green, Luster: Vitreous, crystal structure: Triclinic, cleavage: Perfect in two directions, specific gravity: 2.56-2.58

Hardness: 6-6

Identified February 9, 2026More mineral →

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Physical properties

Hardness: 6-6.5 (Mohs), Color: Blue-green to turquoise-green, Luster: Vitreous, crystal structure: Triclinic, cleavage: Perfect in two directions, specific gravity: 2.56-2.58

Formation & geological history

Formed in plutonic rocks, primarily granitic pegmatites, through the cooling of silica-rich magma; the green color is attributed to trace amounts of lead and water within the feldspar lattice.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons, beads) and as an ornamental stone for carvings and decorative objects.

Geological facts

Also known as 'Amazon Stone', it was named after the Amazon River, though it is not actually found there; it has been used in jewelry since the time of Ancient Egypt.

Field identification & locations

Identify in the field by its distinct translucent-to-opaque teal color and white streaking (exsolution lamellae); common locations include Brazil, Russia (Urals), Madagascar, and Pikes Peak, Colorado.