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R. Schultz Gems - Fine Brazilian Colored Gemstones
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6.60 ct. Emerald Cut, Rich Medium Forest Green Tourmaline
[TU-093]
$528.00

Shape = Emerald Cut
Color = Nice Rich Medium Forest Green
Clarity = Eye Clean
Size = 13.5x7.5
Weight = 6.60

 

Tourmaline Gemstones

  • Crystal system: Trigonal
  • Chemical composition: Borosilicate complex
  • Color: Green
  • Hardness: 7.0 - 7.5
  • Specific gravity: 3.06
  • Refractive index: 1.62 - 1.64
  • Dispersion: 0.017
  • Pleochroism: pale green, dark green
  • Enhancements: Some very dark green and dark blue green tourmalines are heated to lighten their colors. The treatment is permanent and only occasionally performed.


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