mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
Hardness: 6-6.5 on Mohs scale; Color: turquoise-green to pale green with white streaks; Luster: vitreous to pearly; Crystal Structure: triclinic; Cleavage: perfect in two directions; Specific Gravity: 2.56-2.58
- Hardness
- 6-6
- Color
- turquoise-green to pale green with white streaks
- Luster
- vitreous to pearly
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Physical properties
Hardness: 6-6.5 on Mohs scale; Color: turquoise-green to pale green with white streaks; Luster: vitreous to pearly; 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 hydrothermal processes. The green color is caused by trace amounts of lead and water within the feldspar structure.
Uses & applications
Primarily used as a gemstone for jewelry, ornamental carvings, and as a popular specimen for mineral collectors.
Geological facts
Known as the "Amazon Stone," it is named after the Amazon River, although no deposits have actually been found there. It was used by Ancient Egyptians for jewelry and amulets.
Field identification & locations
Identify by its distinct bluish-green color and 'Schiller' effect (a slight metallic sheen) when rotated. Commonly found in Russia, USA (Colorado/Virginia), Brazil, and Ethiopia.
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Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
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