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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO TOURMALINE SLICE

 

46 grms.  Polychrome tourmaline Slice

 82.3 x 76.1 mm. Thickness: 3.3 mm.

(Stone found in alluvium.)

Moderately included.  Enhancement: none (N)

stone PRICE  

USD 1100.00

ORIGIN: Madagascar

   ref: Tsl46g 

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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