mineral
Amazonite
Microcline (KAlSi3O8) with Pb impurities
Hardness: 6-6.5 Mohs scale; Color: light green to turquoise; Luster: Vitreous; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58
- Hardness
- 6-6
- Color
- light green to turquoise
- Luster
- Vitreous
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Physical properties
Hardness: 6-6.5 Mohs scale; Color: light green to turquoise; Luster: Vitreous; Crystal Structure: Triclinic; Cleavage: Perfect in two directions; Specific Gravity: 2.56-2.58
Formation & geological history
Formed in granitic pegmatites and metamorphic rocks through slow cooling of potassium-rich magma. The green color is caused by trace amounts of lead and water within the feldspar lattice.
Uses & applications
Used primarily as a gemstone for jewelry, cabochons, beads, and as a popular mineral specimen for collectors.
Geological facts
Amazonite is named after the Amazon River, though it is not actually found there. It is sometimes referred to as 'Amazon stone.' It is a variety of Microcline feldspar.
Field identification & locations
Identify by its distinct blue-green color and 'Schiller' effect (shimmery white streaks). Commonly found in Brazil, Russia (Urals), Ethiopia, and Pike's Peak, Colorado, USA.
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Green Apatite on Albite
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