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Tanzanite
Tanzanite

Tortoiseshell
Tortoiseshell



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Tanzanite
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Tortoiseshell
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
Hard
3.35
Uneven, Conchoidal
Perfect {010}, imperfect {100}
6.5-7
Ca2Al3(SiO4)3(OH)
 
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-
-
1.25-1.35
-
None
-9999
-