mineral
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
Hardness: 6-6.5 (Mohs), Color: pale green to turquoise-green, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Two perfect directions, Specific Gravity: 2.56-2.58
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs), Color: pale green to turquoise-green, Luster: Vitreous to pearly, Crystal Structure: Triclinic, Cleavage: Two perfect directions, Specific Gravity: 2.56-2.58
Formation & geological history
Forms in igneous environments, specifically pegmatites and granites, through the cooling of magma. Its color is attributed to the presence of lead and water within the crystal lattice.
Uses & applications
Predominantly used as a gemstone for jewelry (cabochons and beads) and as a lapidary material for carvings and decorative objects.
Geological facts
Amazonite is named after the Amazon River, although ironically, it is not actually found there. It is the only green variety of potassium feldspar.
Field identification & locations
Identify by its distinct blue-green color and 'Schiller' effect (a slight white streaking or shimmering). Common locations include the Pikes Peak area in Colorado, Brazil, and Russia.
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Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
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Mineral/Rock