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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

23.43 cts. Polychrome tourmaline  Slice

 34 x 30 mm. Thickness: 2.1 mm. (Stone found in alluvium.)

Moderately included. Enhancement: none  (N)

stone PRICE  USD 186.00

ORIGIN: Madagascar

   ref: Tsl2343   

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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