mineral
Amazonite
Microcline (KAlSi3O8 variant)
Hardness: 6-6.5 (Mohs scale), Color: Teal blue to green 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: Teal blue to green with white streaks, Luster: Vitreous to pearly, Crystal structure: Triclinic, Cleavage: Perfect in two directions.
Formation & geological history
Forms in granites and pegmatites through hydrothermal activity. The distinct color is caused by trace amounts of lead and water within the feldspar structure.
Uses & applications
Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular mineral specimen for collectors.
Geological facts
Named after the Amazon River, although ironically no deposits have been found there; the name likely refers to other green stones once found in that region.
Field identification & locations
Look for the characteristic 'schiller' or grid-like white patterns (perthitic texture). Commonly found in Russia (Ilmen Mountains), USA (Colorado), Brazil, and Madagascar.
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