Amazonite is a translucent to opaque feldspar gemstone with a pretty green color. It is the greenish variety of the mineral Microcline. Amazonite is named after the Amazon River of South America. There are no Amazonite deposits that exist in the Amazon region, so presumably this stone is named to its resemblance in color to the green of the tropical rainforest.
Chemical Formula KAlSi3O8
Color Blue, Green, Purple, Gray, Multicolored
Hardness 6Â -Â 6.5
Crystal System Triclinic
Refractive Index 1.52Â -Â 1.53
SG 2.56Â -Â 2.58
Transparency Translucent to opaque
Double Refraction -.008
Luster Vitreous
Cleavage 2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal
Mineral Class Microcline
Chemical Formula KAlSi3O8
Color Blue, Green, Purple, Gray, Multicolored
Hardness 6Â -Â 6.5
Crystal System Triclinic
Refractive Index 1.52Â -Â 1.53
SG 2.56Â -Â 2.58
Transparency Translucent to opaque
Double Refraction -.008
Luster Vitreous
Cleavage 2,1 - basal ; 2,1 - prismatic ; 3,1 - pinacoidal
Mineral Class Microcline
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