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Chrome-Chalcedony
Chrome-Chalcedony

Black Opal
Black Opal



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Chrome-Chalcedony
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Black Opal

Chrome-Chalcedony and Black Opal Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.55-2.70
-
None
6.5-7
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
 
-
-
-
1.97-2.22
Conchoidal
None
6-6.5
SiO 2 + H 2OUlrich Henn and Claudio C.

Chrome-Chalcedony and Black Opal Chemical Formula

While comparing Chrome-Chalcedony and Black Opal physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Chrome-Chalcedony and Black Opal chemical formula.

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Chrome-Chalcedony and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chrome-Chalcedony and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chrome-Chalcedony Vs Black Opal during the identification of gemstone. Specific gravity of Chrome-Chalcedony is whereas that of Black Opal is .