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LOOSE GREEN TOURMALINE       NATURAL COLOR       Hardness 7.5 
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RETURN TO »» TOURMALINE GREEN

8.53 cts. Green tourmaline octagon cut Single 

17.8 x 8.6 mm. Depth: 6.2 mm. Dark green

Eye clean. Enhancement: none (N) Untreated

stone PRICE  

 SOLD 

ORIGIN: Afghanistan 

ref:Tge853    
 
   
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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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