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

Phone: (612) 664-0252
Toll-Free: (800) 588-8515
E-Mail: gri@gemresources.com
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News & Specials

March Specials Up to 50% off price
New Emerald Green Nano Gemstones, Labradorite Facets, Moonstone Facets, Carnelian Facets & more!

Gem stone metal clay heating tests.
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Black Spinel

Natural Black Spinel

Hard and high polished a great substitute for black diamonds.

Mohs hardness: 7.5 - 8
Refractive index: 1.719
Specific gravity: 3.6 - 4.1
Treatment: None  
Heat Sensitive: None
Care: Usually safe for ultrasonic and steam cleaning

Metal Clay, safe to fire at all temperatures and methods.
Test results; Silver 1200F-1HR-OK, Silver 1475F-1HR-OK, Silver 1650F-2HR OK,  Bronze 1525F-2HR-OK, Copper 1778F-30min-OK

Beliefs associated with spinel are protective stones that assist in re-establishing relationships and resolving issues, help the wearer to put their ego aside in devotion to another person.




Round Facet

3 mm 6 pieces $5.00 12 pieces $9.00
4 mm 4 pieces $5.00 8 pieces $8.00
5 mm 2 pieces $6.00 4 pieces $10.00
6 mm Out of stock Out of stock
7 mm $5.00 each 2 pieces $8.00
8 mm $6.00 each 2 pieces $10.00
10 mm $10.00 each 2 pieces $18.00

 
 
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