mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
Hardness: 6-6.5 (Mohs scale), Color: blue-green to turquoise with white streaks, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect at nearly 90 degrees
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: blue-green to turquoise with white streaks, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Perfect at nearly 90 degrees
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through hydrothermal processes. The distinctive color is caused by trace amounts of lead and water within the feldspar structure during crystallization.
Uses & applications
Used primarily as a gemstone for jewelry (cabochons and beads), ornamental carvings, and as a popular mineral specimen for collectors.
Geological facts
Named after the Amazon River, though it is not actually found there. It is often called 'the Hope Stone' in metaphysical circles. The Pikes Peak area in Colorado is world-famous for producing amazonite with smoky quartz.
Field identification & locations
Identify in the field by its distinct blue-green color, feldspar-like cleavage planes, and 'schiller' or cross-hatch perthitic patterns. Commonly found in Brazil, Russia, Madagascar, and the USA (Colorado and Virginia).
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sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Gypsum (variety Selenite or Alabaster)
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Mineral
Nephrite Jade
Nephrite
Mineral/Rock