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Umbalite
Umbalite
☒

Opal Ethiopia
Opal Ethiopia
☒



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Umbalite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.62-4.33
Uneven
Indiscernible
7-7.5
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
 
-
-
-
-9999
-
None
5.5-6.5
SiO2*nH2O

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