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Gem Resources
PO Box 62006
Minneapolis, MN 55426

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Toll-Free: (800) 588-8515
E-Mail: gri@gemresources.com
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Microcline

Structure : Triclinic
Hardness : 6
Specific Gravity : 2.56
Refractive index : 1.52 - 1.5
Doubly Refracting (bi-refraction) : 0.008

 
 
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