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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

 8.91 cts. Polychrome tourmaline Slice

25 x 26.9  mm. Thickness: 2 mm.

Moderately included.  Enhancement: none  (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

   ref: Tsl891  
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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