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LOOSE BI-COLOR TOURMALINE   NATURAL COLOR   Hardness 7.5 

RETURN TO »»  TOURMALINE BI COLOR

  

3.46 cts. Natural Bi-color tourmaline emerald cut Single 

9.3 x 7.6 mm. depth: 6.4 mm.

  Eye clean. Enhancement: none (N) Untreated

stone PRICE  USD 295.00

ref: TObie346   ORIGIN: Madagascar

    

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