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BLUE-GREEN TOURMALINE         NATURAL COLOR          Hardness 7.5 

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14.67 cts. cab. blue-Green tourmaline single 

  21.9 x 11.8 x 7.5  mm.

Slightly included. Enhancement: none (N)

stone PRICE  

USD 689.00 

ORIGIN: Afghanistan

ref:cabTga 1467   
Hardness: 7 - 7.5
Specific Gravity: 3.0+   Visual Catalog
Refractive Index: 1.62 - 1.68 Tourmaline data
Chemical Composition: Na(Li,Al)3Al6Si6O18(BO3)3 (OH)4, Sodium Lithium Aluminum Boro-Silicate Hydroxide   Ask a question
Crystal Structure: Trigonal
                  
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