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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

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88.68 cts. Slice polychromatic tourmaline 

48.7 x 41.3  mm. Thickness: 3.7 mm.

Moderately included.  Enhancement: none (N)

Set PRICE  (4pcs.)

    SOLD    

ORIGIN: Madagascar

                            ref:4pcs. Tsl set35019                              

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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