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SET TOURMALINE SLICE       NATURAL COLOR       Hardness 7.5

RETURN TO TOURMALINE SLICE

 

40.55 cts. Set sliced tourmaline 

 20 x 18 mm. Thickness: 3.5 mm.

Moderately included.  Enhancement: none (N)

stone PRICE  USD 245.00

ORIGIN: Madagascar

  ref: SetTosl4055c   

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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