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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

 22.22 cts. Polychrome tourmaline Slice

 27.6 x 24.5  mm. Thickness: 2.8 mm. (Stone found in alluvium.)

Moderately included. Enhancement: none  (N)

stone PRICE  

USD 239.00 

ORIGIN: Madagascar

  ref: Tsl2222  
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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