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 TOURMALINE  object         NATURAL COLOR     Hardness 7.5  



32 grms.Tourmaline  Single 

35.5 x 21.4 mm.

  Enhancement: none (N)

stone PRICE  

USD 890.00 

ORIGIN: Madagascar


Hardness: 7 - 7.5
Specific Gravity: 3.0+
Refractive Index: 1.62 - 1.68 Tourmaline data
Chemical Composition: Na(Li,Al)3Al6Si6O18(BO3)3 (OH)4, Sodium Lithium Aluminum Boro-Silicate Hydroxide    Ask a question
Crystal Structure: Trigonal   Gem-O-Scope
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