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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

  

 18.36 cts. Polychrome tourmaline Slice

 28.3 x 25.2  mm. Thickness: 2.3 mm. (Stone found in alluvium.)

Moderately included. Enhancement: none  (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

  ref: Tsl1836  
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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