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  TOURMALINE SLAB           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

 200 cts.  Slice polychromatic tourmaline 

 79.5 x 73 mm.  This stone was found in alluvium.

Moderately included.  Enhancement: none (N)

               stone PRICE     

            USD 790.00     

ORIGIN: Alakamisy Itenina, Madagascar

ref: Tsl 20000
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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