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LOOSE GREEN TOURMALINE      NATURAL COLOR       Hardness 7.5 
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Octagon green tourmaline gemstone, exclusive loose faceted tourmalines, Madagascar gemstones shopping

5.27 cts Green tourmaline emerald cut faceted single

 11.9 x 9.7 mm.

  lightly included. Tone scale: medium. Enhancement: none (N) 

stone PRICE 

 SOLD 

ORIGIN: Madagascar 

  ref:Tge 527   
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Tourmaline Discovery
Hardness: 7 - 7.5
Specific Gravity: 3.0+    Visual Catalog

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Tourmaline data
Refractive Index: 1.62 - 1.68
Chemical Composition: Na(Li,Al)3Al6Si6O18(BO3)3 (OH)4, Sodium Lithium Aluminum Boro-Silicate Hydroxide
Crystal Structure: Trigonal
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