Gem Resources
PO Box 62006
Minneapolis, MN 55426
Phone/Text:(612)327-7374
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Topaz Swiss Blue
Natural Swiss Blue Topaz Cabochon
Treatment:Irradiated and heat-treated
Refraction Index: 1.610 - 1.620
Hardness: 8
Specific Gravity: 3.53 - 3.56
Dispersion: 0.014
Treatment: Irradiated and heat-treated
Oval Cabochon