mineral
Amazonite
Microcline feldspar (KAlSi3O8)
AI-generated identification · may be incorrectHardness of 6 on Mohs scale, pale to vibrant green or turquoise-blue color, vitreous to pearly luster, triclinic crystal system, and two directions of good cleavage.
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Physical properties
Hardness of 6 on Mohs scale, pale to vibrant green or turquoise-blue color, vitreous to pearly luster, triclinic crystal system, and two directions of good cleavage.
Formation & geological history
Formed in pegmatites and granitic rocks through slow cooling of magma and hydrothermal processes, often containing trace amounts of lead and water.
Uses & applications
Used primarily as a semi-precious gemstone in cabochons, beads, and ornamental carvings, as well as sought after by mineral collectors.
Geological facts
Despite its name, no amazonite is sourced from the Amazon River basin; the green color was historically attributed to copper, but is now known to be caused by lead and water defects.
Field identification & locations
Identified by its distinctive mottled green color and grid-like twinning patterns; found globally including in Russia, Colorado USA, and Brazil.
