Tourmaline slice 11.62 cts.

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TOURMALINE SLICE NATURAL COLOR Hardness 7.5

11.62 cts. Polychrome tourmaline Slice

23.1 x 18.9 mm. Thickness : 2.7 mm. ( Macle)

Moderately included. Enhancement: none (N)

stone PRICE USD 98.00

ORIGIN: Madagascar

ref: Tsl1162

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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