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  TOURMALINE SLICE           NATURAL COLOR            Hardness 7.5

RETURN TO »» TOURMALINE SLICE

 

22 grs. polychromatic tourmaline Slice 

 79 x 62.2 mm. (Stone found in alluvium.)

Moderately included.  Enhancement: none  (N)

stone PRICE  

USD 300.00

ORIGIN: Madagascar

  ref: Tsl22gr   
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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