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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO TOURMALINE SLICE

 

26.55 cts. Polychrome tourmaline  Slice  

34.4 x 30.5 mm. Thickness : 24 mm. ( Shape is natural )

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

pair PRICE  USD 370.00 

ORIGIN: Madagascar

   ref: TsL2655 

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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