mineral
Amazonite
Tectosilicate Microcline (KAlSi3O8)
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs. Color: Turquoise-green to blue-green. Luster: Vitreous. Crystal Structure: Triclinic. Cleavage: Perfect in two directions. Gravity: 2.56-2.58.
- Hardness
- 6-6
- Color
- Turquoise-green to blue-green
- Luster
- Vitreous
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Physical properties
Hardness: 6-6.5 Mohs. Color: Turquoise-green to blue-green. Luster: Vitreous. Crystal Structure: Triclinic. Cleavage: Perfect in two directions. Gravity: 2.56-2.58.
Formation & geological history
Formed in plutonic rocks, primarily pegmatites, where igneous cooling allows for large crystal formation. Its color is attributed to trace amounts of lead and water within the feldspar structure.
Uses & applications
Predominantly used as a gemstone for jewelry, ornamental carvings, and a popular specimen for mineral collectors due to its vibrant color.
Geological facts
Named after the Amazon River, though it is not actually found there; it was likely confused with other green stones from the region. It is a variety of Microcline feldspar.
Field identification & locations
Identify by its distinct blue-green color and 'Schiller effect' (pearly luster on cleavage planes). Commonly found in Russia, Brazil, and the USA (Colorado and Virginia).
