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R. Schultz Gems - Fine Brazilian Colored Gemstones
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1.76 ct. Elongated Emerald Cut, Bright Bluish Green Tourmaline
[TU-136]		 $141.00

Shape = Elongated Emerald Cut
Color = Bright Bluish Green
Clarity = Eye Clean
Size = 11.5x5
Weight = 1.76
 

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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