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Alexandrite
Alexandrite

Chrysoprase
Chrysoprase



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Alexandrite
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Chrysoprase
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.69-3.81
-
1,1 ; 3,2.
8.5
BeAl 2 O 4
 
-
-
-
2.58-2.64
-
None
6.5-7
SiO2 (with a high level of nickel impurities )