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Dravite
Dravite
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Opal Ethiopia
Opal Ethiopia
☒



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Opal Ethiopia
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.03-3.18
Uneven, Irregular, Conchoidal
{???} Indistinct
7-7.5
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
 
-
-
-
-9999
-
None
5.5-6.5
SiO2*nH2O

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