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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

10.99 cts. Polychrome tourmaline  Slice 

34.5 x 17.5 mm. Thickness 1.9 mm.  ( Some borders are worked.)

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

pair PRICE   USD 225.00 

ORIGIN: Madagascar

   ref: TsL1099 

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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