mineral
Amazonite
Microcline (KAlSi3O8) with lead trace impurities
Hardness: 6-6.5 (Mohs); Color: Green to bluish-green; Luster: Vitreous; Crystal system: Triclinic; Cleavage: Perfect in two directions.
- Hardness
- 6-6
- Color
- Green to bluish-green
- Luster
- Vitreous
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Physical properties
Hardness: 6-6.5 (Mohs); Color: Green to bluish-green; Luster: Vitreous; Crystal system: Triclinic; Cleavage: Perfect in two directions.
Formation & geological history
Formed in granitic pegmatites, hydrothermal veins, and schists. The green color is believed to be caused by traces of lead and water within the feldspar structure.
Uses & applications
Used primarily as a gemstone for jewelry, cabochons, beads, and as decorative carvings or collector specimens.
Geological facts
Named after the Amazon River, although no deposits have actually been found there. It was historically used by ancient Egyptians for jewelry and amulets.
Field identification & locations
Identify by its distinct green color often with white streaking or schiller effect. Commonly found in Colorado (USA), Brazil, Russia, and Madagascar.
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Metamorphic
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metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
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Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous