mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (variety of Microcline)
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; Specific Gravity: 2.56-2.58.
- 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; Specific Gravity: 2.56-2.58.
Formation & geological history
Formed in deep-seated igneous environments, primarily pegmatites and granites. The color is attributed to the presence of lead and water within the feldspar structure.
Uses & applications
Primarily used as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for mineral collectors.
Geological facts
Named after the Amazon River, though it is not actually found there. It is often called the 'Hope Stone' in metaphysical circles and has been used since ancient Egypt for jewelry.
Field identification & locations
Identify by its unique blue-green color and 'Schiller' effect (a silvery sheen or mottled white streaks). It is commonly found in Russia, Brazil, Ethiopia, and the Pikes Peak area of Colorado, USA.
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Metamorphic
Epidote
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metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous