mineral

Tumbled amazonite

Amazonite, green microcline feldspar (KAlSi₃O₈)

AI-generated identification · may be incorrect

Blue-green to green, mottled and polished, with a pearly to vitreous luster; Mohs hardness 6–6.5, specific gravity about 2.55–2.63, triclinic crystal structure, and two cleavages. The specimen’s color and blocky internal pattern are consistent with amazonite, though lighting and treatment can affect appearance.

Identified August 31, 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 of magma. Most specimens are geologically Precambrian to younger, depending on the pegmatite locality.

Uses & applications

Used as a decorative stone, cabochon, bead, carving material, and inexpensive collector mineral; rarely used as an industrial feldspar because attractive material is limited.

Geological facts

Its blue-green color is associated mainly with trace lead and water-related defects in the crystal lattice. It is commonly confused with dyed quartz, aventurine, or turquoise.

Field identification & locations

Common localities include Colorado and Virginia, USA; Brazil; Madagascar; Russia; and Namibia. Identify it by blue-green color, feldspar cleavage, moderate hardness, and blocky white-green pattern; avoid ultrasonic cleaning and harsh impacts.