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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

  

24.83 cts. Polychrome tourmaline  Slice   

40.3  x 25.9 mm. Thickness : 21 mm. ( Shape is natural )

Slightly included. Enhancement: none (N)   (Stone found in alluvium.)

stone PRICE  USD 240.00 

ORIGIN: Madagascar

   ref: Tsl2483  

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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