mineral

Amazonite

KAlSi3O8 (Potassium aluminum silicate - blue-green variety of Microcline)

Hardness: 6-6.5 on Mohs scale; Color: Pale green to turquoise blue-green; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58

Hardness: 6-6
Color: Pale green to turquoise blue-green
Luster: Vitreous to pearly

Identified May 2, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale; Color: Pale green to turquoise blue-green; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58

Formation & geological history

Forms primarily in granitic pegmatites and metamorphic rocks through hydrothermal processes. Its unique color is caused by trace amounts of lead and water within the feldspar structure.

Uses & applications

Mainly used as a gemstone for jewelry, ornamental carvings, and a popular specimen for mineral collectors.

Geological facts

Named after the Amazon River, although ironically no deposits have been found there; the name likely refers to its green color resembling the jungle or other green stones once found in the region.

Field identification & locations

Identify in the field by its distinct blue-green color often accompanied by white streaking (exsolution lamellae). Commonly found in Russia (Urals), USA (Colorado/Virginia), Madagascar, and Brazil.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Schist

Metamorphic

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral