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Opal
Opal

Caledonite
Caledonite



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Opal
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Caledonite

Opal and Caledonite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
Brittle
-
-
5.6-5.76
Uneven
[001] perfect; [100] distinct
2.5-3
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Opal and Caledonite Chemical Formula

While comparing Opal and Caledonite 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 Opal and Caledonite chemical formula.

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Opal and Caledonite Specific Gravity

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