mineral
Amazonite
Microcline (KAlSi3O8) with Pb impurities
AI-generated identification · may be incorrectHardness: 6-6.5 Mohs scale. Color: Green, blue-green, or turquoise. Luster: Vitreous to pearly. Crystal Structure: Triclinic. Cleavage: Perfect at nearly 90 degrees. Specific Gravity: 2.56-2.58.
- Hardness
- 6-6
- Color
- Green, blue-green, or turquoise
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 Mohs scale. Color: Green, blue-green, or turquoise. Luster: Vitreous to pearly. Crystal Structure: Triclinic. Cleavage: Perfect at nearly 90 degrees. Specific Gravity: 2.56-2.58.
Formation & geological history
Amazonite is a variety of potassium feldspar that forms primarily in granitic pegmatites and metamorphic rocks under slow-cooling conditions. Its color results from trace amounts of lead and water within the feldspar structure.
Uses & applications
Used primarily as a gemstone for jewelry, cabochons, and decorative carvings. It is also highly prized by mineral collectors for its vibrant color.
Geological facts
Named after the Amazon River, though it is not actually found there; it was historically confused with other green stones from that region. It is a tectosilicate mineral.
Field identification & locations
Identified by its distinctive blue-green color and grid-like perthitic texture (white streaks). Commonly found in the Ilmen Mountains (Russia), Colorado (USA), Madagascar, and Brazil. Collectors should look for saturated color and minimal fractures.
