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  PAIR TOURMALINE SLICE        NATURAL COLOR         Hardness 7.5

RETURN TO TOURMALINE SLICE

 

67.88 cts. Pair Polychrome tourmaline  Slice

32 x 32.6  mm. Thickness 3.1 mm.

Slightly included. Enhancement: none (N)

pair PRICE    USD 620.00 

ORIGIN: Madagascar

   ref: pairTsl6788 

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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