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Gem Resources International
Gem Resources
PO Box 62006
Minneapolis, MN 55426

Phone: (612) 664-0252
Toll-Free: (800) 588-8515
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News & Specials

May Specials!
Up to 50% off normal prices.
Lapis, Turquoise, Pink Coral, Labradorite, Mother of Pearl, Carnelian, Moonstone & More.

Gem stone metal clay heating tests.
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Hardness: 9
Refractive index: 1.76
Specific Gravity: 4.0
Dispersion: .018 medium
Species: Corundum
Heat Sensitivity: None
Treatment: Heat Treated

Metal Clay firing test results; Silver 1200F-1HR-OK, Silver 1475F-1HR-OK, Silver 1650F-2HR OK,  Bronze 1525F-2HR-OK, Copper 1778F-30min-OK

Round Facet

2.50 mm $15.00 each 2 pieces $25.00

Square Facet

2 x 2 mm 2 pieces $5.00 4 pieces $8.00

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