Mineral

Amazonite

K(AlSi3O8) - Lead-bearing Microcline (Potassium Feldspar)

Hardness: 6-6.5 on Mohs scale; Color: Green, blue-green, or turquoise-blue often with white streaking; Luster: Vitreous to pearly; Crystal Structure: Triclinic; Cleavage: Perfect in two directions reaching near 90 degrees; Specific Gravity: 2.56-2.58.

Hardness: 6-6
Luster: Vitreous to pearly

Identified March 20, 2026More mineral →

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Physical properties

Formation & geological history

Formed primarily in granite pegmatites and hydrothermal veins. Its distinct color is caused by trace amounts of lead and water within the feldspar structure during crystallization. It is typically found in Precambrian to Paleozoic rock formations.

Uses & applications

Predominantly used as a gemstone for jewelry (cabochons and beads) and as an ornamental stone for carvings. It is also a popular specimen for mineral collectors.

Geological facts

Amazonite is named after the Amazon River, though it is not actually found there; it was likely confused with other green stones from the region. It is often called 'Amazon Stone' and was used in Ancient Egypt for jewelry and funeral amulets.

Field identification & locations

Identify in the field by its distinct 'shiller' or vitreous luster and characteristic white grid-like streaks (perthitic texture). Common locations include the Pikes Peak area in Colorado (USA), Brazil, Russia (Urals), and Madagascar. Collectors should look for vibrant blue-green hues and well-defined crystal faces.

Other mineral specimens

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

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

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral