mineral

Amazonite

Potassium Feldspar (Microcline) - K(AlSi3O8)

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

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

Identified March 22, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in deep-seated igneous rocks known as pegmatites, usually through the slow cooling of magma. Its green color is attributed to trace amounts of lead and water within the feldspar structure.

Uses & applications

Primarily used as a gemstone in necklaces, bracelets, and rings. Historically used by ancient Egyptians for jewelry and amulets. It is also highly valued as a collector's mineral specimen.

Geological facts

Known as the 'Amazon Stone,' though it is not actually found in the Amazon River. It was once believed to be from the Amazon region, but those green stones were likely nephrite jade. It is famously associated with smoky quartz in world-class specimens.

Field identification & locations

Identify by its distinctive sea-green to turquoise color and characteristic white streaks or 'schiller' effect. Common locations include Colorado (Pikes Peak), Russia (Miass), and Madagascar. Collectors should look for vibrant color saturation and a glassy luster.

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Arenite (SiO2 based)

sedimentary

Epidote

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

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Nephrite Jade

Nephrite

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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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