mineral

Tumbled amazonite

Amazonite, green microcline feldspar (KAlSi₃O₈)

AI-generated identification · may be incorrect

Blue-green to turquoise, opaque, vitreous to pearly luster, commonly mottled with white streaks; Mohs hardness 6–6.5, triclinic crystal structure, and perfect feldspar cleavage, though tumbling rounds the specimen.

Identified September 2, 2026More mineral →

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Physical properties

Formation & geological history

Forms in potassium-rich granitic pegmatites as a variety of microcline, typically during late-stage crystallization in Precambrian to younger intrusive rocks. Common sources include Colorado and Virginia (USA), Brazil, Madagascar, and Russia.

Uses & applications

Used primarily as a lapidary and ornamental stone for cabochons, beads, carvings, and polished specimens; it has modest jewelry and collector value.

Geological facts

Its blue-green color is associated with trace lead and water-related defects in the feldspar lattice, not copper. The pictured piece is likely polished or tumbled rather than naturally crystal-faced.

Field identification & locations

Identify it by its turquoise-green color, feldspar-like white grid or mottling, moderate hardness, and lack of banding; distinguish it from turquoise, which is usually waxier and softer. Field localities are granitic pegmatites.