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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

14.65 cts. Polychrome tourmaline  Slice

20.9  x 18.8 mm. Thickness : 3.5 mm.

Slightly included. Enhancement: none (N)

stone PRICE    SOLD 

ORIGIN: Madagascar

   ref: Tsl1465  

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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