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Orbicular jasper
Orbicular jasper

Star Sapphire
Star Sapphire



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Orbicular jasper
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Star Sapphire
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
None
-9999
-
 
-
-
-
3.90-4.05
-
None
-9999
Al 2O 3Ulrich Henn and Claudio C.