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Precious Opal
Precious Opal
☒

Sulfur
Sulfur
☒



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Precious Opal
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.25
Conchoidal
None
5-6.5
SiO 2 · nH 2OGemdat.org , Management Team (2012)
 
-
insoluble
-
-9999
-
{???} Imperfect, {???} Imperfect
-9999
S8

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