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 Gemstones


Umbalite
Fire Agate
Fire Agate and Umbalite Physical Properties


Physical Properties
Tenacity
-  
-  
Solubility
-  
-  
Durability
-  
-  
Specific Gravity
3.62-4.33  
2.60-2.64  
Fracture
Uneven  
Uneven, Splintery, Conchoidal  
Cleavage
Indiscernible  
Absent  
Mohs Hardness
7-7.5  
6.5-7  
Chemical Composition
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)  
SiO 2Arthur Thomas , Gemstones (2009)  
Optical Properties >>
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Compare Gems Found In Africa

Gems Found In Africa

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Compare Gems Found In Africa

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