mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
Mohs hardness 6 to 6.5; pale blue-green to teal with white streaks/veining; vitreous to pearly luster; triclinic crystal system; perfect cleavage in two directions at nearly 90 degrees; specific gravity 2.56-2.58.
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Physical properties
Mohs hardness 6 to 6.5; pale blue-green to teal with white streaks/veining; vitreous to pearly luster; triclinic crystal system; perfect cleavage in two directions at nearly 90 degrees; specific gravity 2.56-2.58.
Formation & geological history
Formed in igneous pegmatites and metamorphic rocks under specific conditions where lead impurities and water content replace potassium in the crystal lattice, giving it its distinct blue-green hue.
Uses & applications
Popular for lapidary work, cabochons, beads, jewelry, carved ornaments, and metaphysical crystal collections.
Geological facts
Amazonite is named after the Amazon River, though no deposits are actually found there. Its distinctive turquoise-blue color was long thought to come from copper, but modern research shows it is caused by trace amounts of lead and water within the feldspar structure.
Field identification & locations
Look for a pale mint-green to blue-green color with white albite/quartz micro-veining and pearly reflection when angled. Major localities include Colorado and Virginia (USA), Madagascar, Brazil, and Russia.
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Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
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Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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Gypsum (variety Selenite or Alabaster)
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Mineral