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Gem Resources
PO Box 62006
Minneapolis, MN 55426
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gri@gemresources.com
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Up to 50% off normal prices.
Round and Oval Cubic Zirconia & Lab Sapphire Cabochons, Faceted Black Spinel, Iolite & More!
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Faceted Gems
Monthly Specials
Natural Cabochons
Lab Created Cabs
Sapphire Suites
Rough Gemstones
Bullets, Rose Cut & Checkerboard
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Lab Faceted Gemstones
Jasper (Chalcedony)
Structure :
Trigonal
Hardness :
7
Specific Gravity :
2.61
Refractive index :
1.53 - 1.5
Doubly Refracting (bi-refraction) :
0.004
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