mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (Triclinic)
Hardness: 6-6.5 (Mohs scale), Color: Blue-green, turquoise, or green (often with white streaks), Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect in two directions
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: Blue-green, turquoise, or green (often with white streaks), Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect in two directions
Formation & geological history
Formed in plutonic rocks, primarily pegmatites and granites, through hydrothermal action. It gains its distinctive color from lead impurities and water content within the feldspar lattice.
Uses & applications
Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors for its aesthetic color.
Geological facts
Amazonite is a variety of Microcline feldspar. Despite its name, it is not found in the Amazon River itself, but was named for the region where similar green stones were found previously. It is also known as 'Amazon Stone'.
Field identification & locations
Identify by its unique 'schiller' or cross-hatched pattern (tartan twinning) and its bright turquoise color. Common locations include Madagascar, Russia, Brazil, and Pikes Peak, Colorado.
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sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Mineral
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Mineral/Rock