mineral

Amazonite

Microcline (KAlSi3O8) with trace Lead (Pb)

Hardness: 6-6.5 Mohs. Color: pale green to turquoise-blue. Luster: vitreous to pearly. Crystal system: triclinic. Cleavage: perfect in two directions. Specific gravity: 2.55-2.57.

Hardness: 6-6
Color: pale green to turquoise-blue
Luster: vitreous to pearly

Identified July 3, 2026More mineral →

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Physical properties

Hardness: 6-6.5 Mohs. Color: pale green to turquoise-blue. Luster: vitreous to pearly. Crystal system: triclinic. Cleavage: perfect in two directions. Specific gravity: 2.55-2.57.

Formation & geological history

Amazonite is a variety of potassium feldspar (microcline) formed in granitic pegmatites. It forms through crystallization from hydrothermal fluids or cooling magma, often associated with smoky quartz and albite. Its color is attributed to trace amounts of lead and water within the crystal structure.

Uses & applications

Primarily used as a gemstone for jewelry (beads, cabochons), ornamental carvings, and a popular specimen for mineral collectors.

Geological facts

Named after the Amazon River, though it is not actually found there. It was likely confused with other green stones from that region in historical times. The most famous specimens come from the Pikes Peak area in Colorado, USA, often found with large deep-black smoky quartz crystals.

Field identification & locations

Identify by its distinct greenish-blue color and the presence of white streaks or 'schiller' caused by albite exsolution lamellae. Generally found in pegmatite deposits in Colorado (USA), Brazil, Russia (Urals), and Madagascar.