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RUBELLITE                     NATURAL COLOR                     Hardness 7.5  
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14.16 cts. Rubellite oval Single 

 18.8 x 14.4 mm. (S.u.g.f. cut)

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

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ORIGIN: Brazil

   ref:Tro 1416   

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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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