mineral

Amazonite

Potassium feldspar (Microcline), K(AlSi3O8)

Hardness: 6.0-6.5 (Mohs scale); Color: Green to blue-green; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions reaching nearly 90 degrees; Specific gravity: 2.56-2.58.

Hardness: 6
Color: Green to blue-green
Luster: Vitreous to pearly

Identified February 14, 2026More mineral →

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Physical properties

Formation & geological history

Formed in plutonic igneous rocks, primarily pegmatites, through the cooling of magma. Its distinctive color is attributed to the presence of lead and water within the feldspar structure. Most specimens date from the Proterozoic to Phanerozoic eras.

Uses & applications

Primarily 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 due to its unique color.

Geological facts

Formerly thought to be colored by copper, research suggests the green hue is due to small amounts of lead and water. It is known as the 'Stone of Hope' and was used in ancient Egypt, including specimens found in King Tutankhamun's treasures.

Field identification & locations

Identify in the field by its distinct teal/green color, grid-like white streaks (perthitic texture), and characteristic cleavage planes. Common locations include the Pikes Peak area in Colorado, USA, as well as Brazil, Russia (Urals), and Madagascar.

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Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

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

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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)]

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Epidote

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

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