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Diaspore
Ruby
Ruby and Diaspore Physical Properties


Physical Properties
Tenacity
Very brittle  
Brittle  
Solubility
insoluble  
-  
Durability
-  
-  
Specific Gravity
3.30-3.40  
3.97-4.05  
Fracture
Conchoidal  
Conchoidal  
Cleavage
{010} perfect, {110} distinct, {100} in traces  
No true cleavage  
Mohs Hardness
6.5-7  
9  
Chemical Composition
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references  
Al 2 O 3  
Optical Properties >>
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