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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

26 grs.  polychromatic tourmaline Slice

 70.4 x 50.4 mm. (Stone found in alluvium.)

Moderately included.  Enhancement: none  (N)

stone PRICE  

 SOLD 

ORIGIN: Madagascar

  ref: Tsl26gr   
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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