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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO TOURMALINE SLICE

   

79.09 cts. Pair Polychrome tourmaline  Slice

43.6 x 32.7 mm. Thickness 3.1 mm.

Moderately included. Enhancement: none (N)

pair PRICE  

USD 370.00 

ORIGIN: Madagascar

  ref: pairTsl7909 

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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