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RARE BI-COLOR TOURMALINE          NATURAL COLOR             Hardness 7.5  
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RETURN TO BI-COLOR TOURMALINE
Tourmaline chemical composition is (Na, Li,Ca) (Fe2, Mg, Mn, Al)3 Al6 I(OH)4 I (BO3)3ISi6O18I .
Crystaline system: Trigonal.
Occurences: In the acid magmatic rocks and associated pegmatites, limestones and schists, placers.
Coloured tourmalines are related to sodolithic pegmatites.
One distinguishes two principal types of tourmalines: the hexagonal type and the triangular one.
Stone Price:  SOLD 33.76cts. Bi-color tourmaline single

 

  x Pieces: 1 Tourmaline x x Type: 100% Natural
 
  Color: White-red   Shape: Emerald cut
                 
  Weight: 33.76 Carats   Size: 21 x 15.6 mm.
 
  Clarity: MI2   Luster: Good
 
  Treatment: None (N)   Origin: Madagascar
Very rare, for collectors    Refr. Index: 1.62-1.64   Hardness 7.5
A needle is visible inside 
the gemstone.  
Bi-color tourmaline red white gemstone, exclusive loose faceted tourmalines, Madagascar gemstones shopping

 

Stone Price: SOLD 

ref: Tbie3376

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  Rare Bi-color tourmaline gemstone, exclusive loose faceted tourmalines, Madagascar gemstones shopping Depth:11.5 mm.

   
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- Scale determining the purity of a stone.  -
FL NFL SI1 SI2 MI1
Flaw less Near flaw less Slightly included 1 Slightly included 2 Medium included 1
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MI2 MI3 VI1 VI2 HI
Medium included 2 Medium included 3 Very included 1 Very included 2 Highly included
 
 
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