Difference between revisions of "Amazonite"

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[[image:Amazonite_xls.jpg|left|thumb|400px|Microcline (aka Amazonite) with albite]]
 
[[image:Amazonite_xls.jpg|left|thumb|400px|Microcline (aka Amazonite) with albite]]
 
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Amazonite is a tradename for [[microcline]] ([[feldspar|K-feldspar]]) and has a green to blue green colour.
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Amazonite is a tradename for [[microcline]] ([[feldspar|K-feldspar]]) and has a green to blue green colour.<br />
 
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[[image:Amazonite_cabs.jpg|Amazonite Cabochons]]
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Microcline has the same chemical composition (KAlSi<sub>3</sub>O<sub>8</sub>) as [[orthoclase]], but it grows as triclinic crystals opposed to the monoclinic orthoclase.
 
Microcline has the same chemical composition (KAlSi<sub>3</sub>O<sub>8</sub>) as [[orthoclase]], but it grows as triclinic crystals opposed to the monoclinic orthoclase.
  

Revision as of 03:30, 27 September 2010

Amazonite
Chemical composition Microcline feldspar
Crystal system Triclinic
Habit Massive
Hardness 6-6.5
Optic nature Biaxial -
Refractive index 1.522-1.530
Birefringence 0.008-0.010
Dispersion Low
Specific gravity 2.56
Lustre Vitreous
Microcline (aka Amazonite) with albite


Amazonite is a tradename for microcline (K-feldspar) and has a green to blue green colour.
Amazonite Cabochons
Microcline has the same chemical composition (KAlSi3O8) as orthoclase, but it grows as triclinic crystals opposed to the monoclinic orthoclase.


Sources