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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO TOURMALINE SLICE

 

85.58 cts. Pair Polychrome tourmaline  Slice

49.1 x 31.6 mm. Thickness 3.3 mm. 

Moderately included. Enhancement: none (N)

pair PRICE  

USD 354.00 

ORIGIN: Madagascar

  ref: pairTsl8558 

Hardness: 7 - 7.5

Growth zoning in a tourmaline crystal.

Specific Gravity: 3.0+
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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