mineral
Amazonite
Microcline (KAlSi3O8)
AI-generated identification · may be incorrectHardness: 6-6.5 on Mohs scale; Color: pale green to turquoise blue; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.
- Hardness
- 6-6
- Color
- pale green to turquoise blue
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: pale green to turquoise blue; Luster: Vitreous to pearly; Crystal structure: Triclinic; Cleavage: Perfect in two directions.
Formation & geological history
Formed in plutonic igneous rocks (pegmatites), granite, and syenite. The characteristic color is caused by the presence of lead and water within the feldspar structure.
Uses & applications
Primarily used as a gemstone in jewelry, beads, cabochons, and as a popular mineral specimen for collectors.
Geological facts
Also known as Amazonstone, though it is not actually found in the Amazon River. It is a variety of microcline feldspar.
Field identification & locations
Look for its distinct blue-green color and grid-like 'perthitic' white streaks. Found in the USA (Colorado), Brazil, Madagascar, and Russia.
