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Mexican fire opal
Mexican fire opal

Chrome-Chalcedony
Chrome-Chalcedony



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Mexican fire opal
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Chrome-Chalcedony
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
None
-9999
SiO2·nH2O
 
-
-
-
2.55-2.70
-
None
6.5-7
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)