Rock Identifier
Amazonite (Microcline feldspar (KAlSi3O8)) — mineral
mineral

Amazonite

Microcline feldspar (KAlSi3O8)

AI-generated identification · may be incorrect

Hardness 6-6.5 on Mohs scale, vibrant green to blue-green color, vitreous luster, triclinic crystal system, and two directions of good cleavage.

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Physical properties

Hardness 6-6.5 on Mohs scale, vibrant green to blue-green color, vitreous luster, triclinic crystal system, and two directions of good cleavage.

Formation & geological history

Formed in pegmatites and hydrothermal veins through the slow cooling of magma rich in potassium and water, often containing trace lead.

Uses & applications

Used primarily as a semi-precious gemstone in jewelry, for decorative carvings, and as a collector mineral specimen.

Geological facts

The characteristic blue-green color was long attributed to copper, but modern studies show it comes from trapped lead and water molecules inside the crystal structure.

Field identification & locations

Easily identified by its unique grid-like or tartan twinning pattern and distinct blue-green color; commonly sourced from Russia, Colorado, and Madagascar.