mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
Hardness: 6-6.5 on Mohs scale; Color: Turqouise-green to bright blue-green; Luster: Vitreous (glassy); Crystal Structure: Triclinic; Cleavage: Perfect in two directions.
- Hardness
- 6-6
- Color
- Turqouise-green to bright blue-green
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: Turqouise-green to bright blue-green; Luster: Vitreous (glassy); Crystal Structure: Triclinic; Cleavage: Perfect in two directions.
Formation & geological history
Forms in pegmatites and granites through hydrothermal activity. Color is derived from trace amounts of lead and water within the feldspar structure. Found in Precambrian and Paleozoic geological deposits.
Uses & applications
Used primarily as a gemstone for jewelry, cabochons, and ornamental carvings. Also popular as a specimen for mineral collectors.
Geological facts
Named after the Amazon River, though it is not actually found there. It was historically called 'Amazon Stone.' It is a variety of Microcline feldspar.
Field identification & locations
Identify in the field by its distinct aqua-green color and typical feldspar 'shiller' or pearly sheen on cleavage planes. Commonly found in Colorado (USA), Russia, Brazil, and Madagascar.
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