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  PAIR TOURMALINE SLICE       NATURAL COLOR        Hardness 7.5

RETURN TO TOURMALINE SLICE

25.97 cts. Pair Polychrome tourmaline  Slice

 22.2 x 20.2 mm.  Thickness 2.4 mm.

Moderately included. Enhancement: none (N)

pair PRICE  

USD 220.00 

ORIGIN: Madagascar

   ref: pairTsl2597

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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