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SET TOURMALINE     NATURAL COLOR      Hardness 7.5 

RETURN TO »»  SET TOURMALINE CABOCHON

8.75 cts. -  4.60 cts. cab. Rubellite  single

19.2 x 11.6 / 13.9 x 9.8  mm.

Moderately included. Enhancement: none (N)

stone PRICE  

USD 897.00 

ORIGIN: Madagascar

  ref:setTOr1335  

Tourmaline:
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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