mineral

Amazonite

KAlSi3O8 (Potassium Aluminum Silicate)

Hardness: 6-6.5 on Mohs scale; Color: turquoise, green, or blue-green; Luster: vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 2.56-2.58

Hardness: 6-6
Color: turquoise, green, or blue-green
Luster: vitreous to pearly

Identified May 13, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale; Color: turquoise, green, or blue-green; Luster: vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect; Specific gravity: 2.56-2.58

Formation & geological history

Formed in plutonic rocks, primarily pegmatites, often found alongside smoky quartz and feldspar. The green-blue color is attributed to the presence of lead and water within the feldspar structure.

Uses & applications

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

Geological facts

Historically called 'Amazon Stone,' it was named after the Amazon River, although no deposits have actually been found there. Ancient Egyptians made jewelry and amulets from it, including some found in King Tutankhamun's tomb.

Field identification & locations

Identify by its distinct grid-like mottled pattern of white and turquoise. It is primarily found in Russia (Ilmen Mountains), USA (Colorado and Virginia), Madagascar, and Brazil.